Funny thing is the chance of getting blood clots from the J&J vaccine is far lower then getting a bad case of covid. There have been 15 cases of blood clots in eight million shots of J&J. Covid likely won't kill you but has a higher chance of causing lasting damage.
Plus the Moderna and Pfizer shots don't have that problem.
No getting the vaccine doesn't make you immune. It does make it much harder for you to catch the virus. Limits the severity of symtom if you do catch it. From what I understand no one who has the vaccine and got Covid has died.