Hi Cheri,
You've asked a lot of good questions, and I'll try to answer them based on my own experiences. I was raised Catholic, and when I was in my mid-20s, I knew in my heart that I belonged in a different denomination. I did my research: I read books on various religions, even those outside of the realm of Christianity; I asked friends for church recommendation; I looked in the Yellow Pages; and I surfed the internet. I visited numerous churches before finding one I fell in love with--a Lutheran church in Mpls. I was a regular attendee before finally becoming an official member about 1 year ago.
My answers below are based on the assumption that you are looking at Christian churches. I have no experience outside of Christianity (besides books), so I can't help you there.
<<I would like to start going, but have no idea how to go about finding the right church?>>
First, determine what you are looking for in a church. Are you looking for somewhere to simply go to service once a week, or are you looking for a church that has a vibrant social life--classes for your kids, volunteer work, etc. Do you want a traditional service, or something more contemporary? You will find plenty of churches at both ends of the spectrum.
Also, depending upon how into doctrine and theology you are, books might be a good resource. The differences that separate the various Christian religions can be slight, but they are very real. Make sure you are comfortable with a church's belief before joining.
<<I was baptized and confirmed Lutheran, is it ok to attend other faiths?>>
Yes, it's OK to attend other church services. Most churches welcome visitors.
<<Also how much do you give for offering?>>
If you are a visitor, I think it is nice to give a couple of bucks if you have it to give. If you want to be discrete, put your offering in an envelope.
If you join a church, it's really individual as to how much you and your family can contribute. Many families earmark 5-10% of their income for charitable purposes, and then take the church offering out of that amount.
Bottom line: Don't give more than you can afford. If you can only donate $1, you still have every right to sit in the pew.
<<What do you wear? Dressy or jeans ok?>>
Dress varies wildly from church to church--at some jeans are OK, while at others, people are in suits and hats. However, I would not wear jeans or sneakers as a visitor. My family attends two different churches, and at both, people dress up a little--think "business casual". If you wore khakis or cords and a nice shirt, you will fit in anywhere.
<<I can't sing or read musical notes, so am I going to be looked down upon for not singing while everyone else in the congregation is? I probably don't remember how to look up the different hymns, or chapters (I can't remember what they're called) either.>>
No one is going to be watching you, and if they are, would you really want to be attending that church, anyway? I don't sing, but I usually follow along in the hymnal. When in doubt, sit quietly and smile. ;-)
Most churches will hand out bulletins that have the songs for that service listed. At some churches, someone announces the songs -OR- the pages for songs are posted at the front of the church. If you are confused as to which book they are singing from--some churches have 2 or 3 hymnals--glance around to see what book people have grabbed.
<<Do all churches offer the wine and bread thing? Do I have to go up there when my row is going?>>
Communion (bread and wine) is hard to address in a few sentences. For starters, Catholic churches offer communion at every single service. However, Catholic doctrine dictates that you must be Catholic in order to receive communion at a Catholic church. So, if you attend a Catholic service, it would be respectful of you *not* to go up.
Mainstream Protestant churches (Methodist, Lutheran, Episcopalian) offer communion regularly--some churches it's every week, while others it's every other or something like that. At these churches, all (including visitors) are invited--but never "required"--to participate. If you don't want to receive communion, simply stay seated. If someone behind you asks if you are going up, smile and say, "I'm not going up. Please go on." Communion is very personal experience. Only go up if you want to, never because you felt like you had to go with the rest of the herd.
In my experience, non-denominational churches do not offer communion.
Good luck to you!