Have you had a chance to try different rentals while you clocked up the time to get your ukara?
I got myself a cheap two tone scar L at first to use at my local site & really liked the feel of the scar so got some more, I love bullpups so tend to take an L85 to every game day & it prob gets the most use along with my scar.
I'm more of a collector than a player so plenty to choose from in my collection but tend to stick to my L85, a scar or an M4. I've ventured into the GBBR side of things but like loads of folks have already said... stick to aeg's until you decide what type of pew you prefer to sling bb's out of.
You'll prob end up buying a few pews eventually but try and hire/borrow different types before deciding... AR15 variants, AK variants, Bullpups, SMG then buy quality over quantity.