hello everybody, wondering on the net and found this site. great site. but i just started fly fishing for about 3 weeks now, maybe fly fish twice a week. im really liking it it's really fun. but here is where im stuck, what fly do i use and where to use the fly? i'v been watching youtube and they said nymphs are for where shallow and rocky waters is at. dry for slow waters and such. but is that true, and what kind of fly works best for places in or near fresno.
and where is a good river, creek or stream to fish at near fresno if you fish at california before?

i dont really know what to really use, so i put what i think they might bite. but i seen some gulps, pull the line, nothing.....

any kind of advice will help,
still new to the sport.