Read Lido's 4th point, and take it to heart. Don't falter from it a bit, for anybody.

Now...for condoms, I can only offer very limited (read: mostly offhand accounts) experience with them, but if it helps, I'll provide what I know. They can be a little on the dry side, but they make lubricated varieties, and of course lubrication (such as KY) is available. It would also help that he not rush things. He should take things slowly, and make sure you are well aroused before attempting any sort of..well, you know.

For him, it does cause a slight loss of sensation, but it's not anything drastic. It's almost like if you put your hand in a latex glove and tested the sensation of rubbing a finger (though the glove is a good deal thicker, so not nearly as much). You can still feel it, it just feels slightly muffled, so to speak. It should not be enough to dampen his enjoyment, so don't worry about that. And for safety in this matter, even if it did, it's worth it.

As far as brands, there's about as much variety in condoms as there are in snowflakes. It can get a little ridiculous. Personally, I have been recommended by a close friend Durex Extra Sensitive (not that I'm particularly in the market for those at this point in my life, but hey. Never a bad time for a sales pitch, I guess?). He swears by them, and I trust his judgment. Although if I were you, I'd simply ask your boyfriend. If he has experience, he probably has his own preference in protection.

At any rate, I'm proud of you for being safe and smart about this (lol though you're my elder by a year, so that feels a little odd to say, but still :P). I wish you all the best.