It sounds like you have got it looking like a bow but feel unsure about what to do next to make it bend like a bow.
One tips that may help get both limbs even is to balance the bow on your finger in the centre and see if it balances. If one limb is heavy that needs a little more wood taken off. When they balance evenly they will probably bend evenly even if the bow is made with one limb shorter than the other.
Once you have it even at about brace height, time to keep careful and not get too carried away with pulling it too hard or too far too soon! A little too much enthusiasm or haste here can be one of those sudden learning experiences after which you say 'I really wish I hadn't done that!'
Tillering the bow will be easier if you set up a tiller tree with a pulley. Hang a good scale on the tiller string and rope through the pulley and exercise the bow, pulling maybe 20 plus times to the draw weight you want. removed wood where it is need to get the bend, exercising the bow ell each time. Keep this up. gradually increasing the draw length, alwys staying at about the draw weight you want. By the time you have got to the draw length and draw weight you want both you and the bow will be well exercised. during this stage use tools that you cannot go too fast with. A metal file and a scraper are good because you cannot suddenly produce a hinge or cut half way through a limb!
Anyway, good luck. Hope I haven't said the obvious. I mention the learning experience because I have had more that I really should and keep on having to force myself to go careful.
Mark in England