You could create an LLC once, and use that for all of your side projects. I did this myself, and it's even kinda fun; my state has good reference material, and the applicable laws are available online.
In Virginia, the requirements boiled down to (1) pick a name that isn't taken, (2) fill out and mail a particular form with a $100 check, (3) keep some paperwork that tracks shareholders - in your case there's just one - and assets.
You probably won't do as good a job as if you were a lawyer, so deciding to do it yourself depends on how seriously you think you need protection.
In Virginia, the requirements boiled down to (1) pick a name that isn't taken, (2) fill out and mail a particular form with a $100 check, (3) keep some paperwork that tracks shareholders - in your case there's just one - and assets.
You probably won't do as good a job as if you were a lawyer, so deciding to do it yourself depends on how seriously you think you need protection.