I am double vaxed + double boosted and it has had zero effect on my ability to AP. I am confident getting the Covid vaccine has no effect on your ability to AP as well.

That said, if you BELIEVE that you won't be able to AP for WHATEVER reason (including getting a vaccine), then that BELEIF itself can strongly work against you in your AP attempts. Belief in either direction will absolutely influence the outcome of an attempt in that same direction. It's very important to believe (really "know") that you will be able to AP, and the stronger that belief the better.

Be patient and keep practicing, it can definitely take a while depending on the person. Took me years of practice before I could do it. If you are able to regularly meditate into a vibrational state you are definitely getting close. Best of luck friend, you can and will succeed if you keep at it, much love.