Without seeing your sides/back it`s not possible to say if you should go Fullcap but I think for the moment, a topper will do you just fine...... it will ease you into the wearing-game. You won`t have the ` worry` of your sides looking [relatively] thin and this contrasting with much thicker/denser hair on top, if you just order a good matching-density.... if you give John a few good-quality sharply-focussed pics of your sides and back and the top of your head, he`ll know what`ll work for you.....the classic error new wearers make is , in their anxiety to `cover-up`, they get a density which is far too high and sticks out like a sore thumb ! A density which allows a little scalp show-through is really one of the major ` tricks` to this game. I think as Baldrich has suggested, in your case, you could get away with holding onto your front growing hair as it looks like it hasn`t receded yet [hopefully won`t for a long time] and you could just fill in the area behind it...... it`s good too that you have the ` support` of a stylist to back you up....... best wishes with it!