should you keep modeling ? Well if you like it, then yes , if not , then no. Everyone starts with boxes and basic buildings or objects , and move on from there. There's numerous tutorials around you can use to learn , as well as some professional training DVDs which you can buy which are extremely good , the commercial dvds might be a bit on the expensive side (usually over $50) , but if your serious about learning modeling they are well worth the money. Here are some links.
http://www.cg-academy.net/pages/topic_mo...g_advanced1.phphttp://smartflix.com/store/video/1524/Modeling-for-GamesAnd there's a million others around , you can also find free tutorials around , there's also 3D Buzz , check them out , they have all the Unreal Technology Video Training Modules for free, which teach you pretty much everything for how to make a game for unreal engine , unreal engine 2 i think , awesome stuff. So dont judge your beggining material , everyone has to start from basic to complex , no one starts modeling unreal 3 characters from the get go. Good luck man.