I definitely recommend the Amazon Basics one along with /u/DatAperture. There are a few different companies that make identical versions, and Amazon Basics is usually the cheapest. These are great for hobbyists because they tilt up and down, rotate left and right, and they have a basic (probably not terribly precise - I'm still testing) amount of power control which is incredibly useful and will take you pretty far into working with strobes.

Combine one of these with great lessons from Strobist, and you'll be set until you're ready for a great $100-ish Yongnuo knockoff of a Nikon/Canon speedlight. If you're looking to blow a hundred bucks right now, then these will work out really well and should last you a long time.

Worst case: When you upgrade, you'll have an extra piece for more complicated lighting setups. I'm having a blast with these $30 radio triggers on my Canon rig with a couple cheap, basic strobes.