Some solutions irritate my eyes to no end. I tried using a generic once to save some money and it was so hard on my eyes. I use Opti-Free which is great.
Just make sure you are washing your hands with soap and water before putting the contacts in and don't dry them with anything that may put fibers on your hands (i.e. your typical plush hand towel). I just leave my hands wet.
Make sure the contact is not inside out. You can test it by putting it in a crease where your hand folds - close your hand just a little, enough to bend the contact. If it folds like a taco, it's right. If it folds out - like sticking to the side of your hand, it's inside out. This will be very painful if you try to put it in inside out. Don't assume becuase you've just taken it out of the packaging that it's right.
Put a drop of solution in your eye before putting the contact in. Also, put the contact on the tip of your finger and "fill" it with a couple drops of solution right before putting it in your eye. This will keep both your eye and your contact hydrated and it will feel much better.
As for them being hard to get in - that just comes with practice. I've been wearing contacts for 20+ years and I can put them in in the pitch dark by now - and I did this weekend camping.... ugh.
Stick to it and give yourself some time to get used to them. In the meantime, go get yourself a pair of super-cute (non Rx!) sunglasses for the summer!