When I got my first T I was terrified of them, couldn't open the lid and anything. My first T was a G.rosea, she's my special girl and have never regretted buying her. She feeds well for a rosea and lets me handle her

For a first tarantula, you want something non-aggressive and pretty.
I'd go for a new world (come from america), something like a B.smithi, G.rosea or an Avicularia species if you fancie an arboreal.
When buying your first T, make sure the actual spider your getting is calm and friendly. Don't just go on the fact that people have said 'Grammostola roseas are great, they're hardly ever nasty!', and buy the spider without checking it first

I'd also suggest buying a young female, you'll get easily attached to them and I was heartbroken when I sexed my first T and discovered it was a male, luckily, I hadn't sexed it right, and she is deffinatly female!!
Once you've bought one, given it a name and watched it wander about in it's tank for a while you'll get over your fear and slowly become more confident around spiders

Hope this was helpful!
Sam
