So I'm new to DnD and I'm having trouble picking good feats for my halfling Sorcerer. He is an evocation flame specialized sorcerer with some spells in lightning to vary it up a little bit.

Currently sitting at level 6 and haven't picked my feat for level 5 yet, and the DM said I can repick my level 3 feat as well since I don't like it. Is there any sort of feat which can miss my teammates when casting an area/line spell like lightning bolt or fireball? Or possibly a feat to make my level 1 touch spell become ranged? Or are there just other feats which I could look over? Such a giant list is a little hard to read through to pick from. My DM said I could pick a 3.5 or 4e feat if it was helpful.

Also, as far as spells, would fireball or lightning bolt be more useful without hurting my other players? (there are 4 other teammates besides me I'd like to NOT hit, haha).