Presta valves - not all that hard..

Take of cap, unscrew release bolt, press down valve - hear "ssssss" you are good to go, secure pump nozzle and pump. If you don't hear "ssss" keep unloosening the bolt.

If you don't know what the release bolt is - picture this - there is a male part to the valve and a female part . The male part attaches to the pump. The female part is a small round washer at the base of the male part. You have to lossen that otherwise no air in. Now remember to tighten it when you are finish or air goes out.

If you can't get it figured out, go to the LBS and ask them to show you. Don't be embarrassed. Trust me, people have brought in worse questions.