if yer a newb to trad, i'd suggest 40# at your draw length, not the weight written on the bow.
even if yer a muscular person, you need to develop 'bow muscles' and you'll shake/tremor for awhile with 40# holding weight 'til you get in decent condition. while that's happening, you don't want to have to fight being initially overbowed - all of that will create havoc with learning basic form. read that again, please.
don't spend a lotta bucks on that bow, but do find one of the correct weight at your draw length - figuring out your draw length will also take some time and that too will more than likely change.
so, i recommend a used r/d longbow or a pacific rim cheap new r/d longbow. get as long a bow length as you can, too. this is a learning bow and one you will come back to for form work - or when you're hurting ... it happens.
remember: the arrow is far more important than the bow, and any decent bow will be better than you are right now.