Longbow is a lot of fun
My coach wouldn't let me pick up a second style until I'd got to 520 on a Portsmouth, and I'm still not at the level set to be able to convert completely (540)
A lot of the longbows I shoot with will tell you that even if you're only interested in longbow that you need a years recurve shooting and coaching before you convert to longbow full time.
So IMO get a training bow, and do a years recurve then branch out into the world of traditional bows