Regarding stress in buying your first boat - yes, it's normal.
When I bought my first keelboat, which I paid $4,000 hard saved dollars for, I really couldn't think straight since I had so many unresolved issues. After paying cash for it we started the outboard engine and headed out to deliver it to home. Fortunately I had an experienced friend with me. Within a mile of the harbor we were leaving the motor stalled. We quickly saw that the prop was fouled with an enormous plastic sheet. Quick get the sail up! Then find the key to unlock the motor anti-theft device to remove the motor. It was about then that the thunder storm hit. Clawing off a lee shore, with a not completely raised main and trying each of about 20 rusty keys, while experiencing cloud to ground lighting strike in torrential rain, is not the way to start boat ownership. But by the end of the day we were enjoying ourselves and my new to me boat.
I always advise new boat owners to take someone experienced with them for the first sail.