I wanna start an eCommerce Brand. Having doubts tho.

I badly wanna start this business.

I really wanna do although my mind is bombarded with doubts, resulting to crippling anxiety every single night before I sleep lol.

Are Facebook ads still worth it?

What ROADBLOCKS do I need to expect?

If I could hire ONE person aside from a mental therapist, who would it be? What would they do specifically?

Someone enlighten me before I go crazy.