Welcome to the forum.
On the brake front.... it depends upon what make the rim brakes are. I have Shimano 105 on one bike and own brand on the other but with 105 blocks. Sure,the 105 calipered brakes are better but I just make allowances whilst braking on the other one. Disc brakes may well be sharper particularly in the wet. Just enjoy your rides and your bike. If you like the bike but feel the brakes let it down then upgrade them at some point.