Yeah, you just need to practice. Keep at it. Also, take a look at all of the stuff JJ2+ has to offer. Best way to do this is probably to either play on servers or just to read the whole manual. There are a range of new gamemodes and stuff to enjoy. So fun fun fun. Also, look at the newer levels and see which ones are good, and notice what little aspects people like about the level. These are to be imitated/improved in your level.