you're lucky your baby is such a good and stable sleeper at night... and predictable.
Since your baby is currently a good sleeper...by all means, go out with Hubby. Keep in mind, that the sleep patterns of babies often are "not" static, and will/can change. SO... since your baby is now sleeping well, at the moment...go for it!
Just get a babysitter you trust or a family member to keep an eye on baby.
As a new parent... it is difficult to go out at night, much less even have a "social calendar." But... you will work it out as you can. Nothing wrong with that. Eventually, you will start to have socials with other couples who have babies too...thereby you can also bring your baby. But going to "adult only" outings are also very enjoyable and a great break for Parents.
For the future... make sure that your Hubby DOES learn and get more comfortable with the Parenting details....so that YOU can then go out and have your own solo or girlfriend's outings too. THIS is important for any Mom. Otherwise, it will end up that you are always the one who has to stay home, while Hubby goes out and has bonding with the guys. There WILL also be times when you just want to go out BY YOURSELF... and take a break. So, discuss that with Hubby too...in advance... so you can both SHARE the Parenting roles adeptly and fairly.
No matter what, the "social life" of new Parents will be altered. It's just the way it is. And, on the flip-side... other friends have to adjust to that too... (especially the one's who do not have kids)... because they can't expect you and Hubby to go out whenever and where-ever anymore...much less bringing baby to a noisy bar venue or late hours. For example: once our close Friend was going to have a BBQ party at night (when kids are typically sleeping)...(this couple does not have kids)- But, my Hubby suggested they have the party earlier like 11:30 for an early lunch because we have kids and our son has a certain nap schedule etc., and we cannot attend otherwise or just he will attend but without our family. So, the party time was changed, and then "coincidently" it turned out that the other couples with children also "decided" to attend after all. This was a good friend of ours so it was fine that the party time was changed- So, just an example of how it is with kids... and coordinating all that going out details.
But really, you and Hubby probably have to talk about "socializing" now that you are Parents. HOW is it going to change, HOW is it going to be done fairly, HOW is it going to be scheduled??? Granted, socializing every weekend it NOT going to be as feasible now with a baby. Some parents I know still keep up their busy socials and after-work socials...but, then their children hardly see them. Or, some Parents just take their baby/children everywhere they go...but then the children have no stability and their needs are not a priority since they are always on the go more than they are at home. In either scenario... the baby/children are just having to follow along to whatever the Parents are doing.
I know of a Mom (A SAHM) for example, that has 2 very young children. She is a social and very independent person... whenever I see her around town she is always by herself and without her kids. The REASON is: she always has her kids at the baby-sitter's even if she does not need to, and the running "joke" of this lady is that she spends more time on herself than she does on her kids and the babysitter is more of a Mom than she is. Even her own Parents say this. Oops! - well just an example.
It will really depend on lifestyle, what you want for baby, what baby "needs", how much social time and going out Hubby wants/needs, and what YOU need. Most of the time, it is the Wife/Mother who sacrifices the most... so head's up. No matter what.. it will be the Mom who is the one who has to soothe the baby the most and tend to it. So, you MUST make sure that you and Hubby are BOTH doing the Parenting. Not just you. It has to be equitable as possible.
My kids are also good nappers, I have them on a schedule, and they sleep pretty predictably at night now too... so per this routine I have with my kids... I don't mess with it, because I don't want the problem of having to get them back on track again. So.. I just do things, have outings, do appointments, go on Dates with Hubby, all around this schedule. It really works out... and most of all, it's do-able.
Find what works for you & Hubby. Every couple is different.
Have fun and good luck!
~Susan