2013 Nissan Sentra SL problems

Hi all, hope you are doing well In these scary
times.
I have a 2013 Nissan Sentra SL with 94k
miles. Lately it’s been having trouble starting
where if I would let it sit for a week(I often
don’t drive for days at a time) it will struggle to
start so I have to charge the battery. This isn’t
a big deal, but a few days ago I was driving
home and I live out in rural Texas with no
neighbors for miles and while I was driving the
rpm meter started acting possessed so I
stopped and turned it off, and when I turned it
on it didn’t go. This is a big deal because I
was stranded for well over an hour with my 1
year old which is not fun. I finally got it to work
which was not easy lol. Today I was pulling
out of my car port and the rpm meter did it
again. I immediately stopped and turned it off.
I’ve heard that these cars have transmission
issues but I’m praying that it’s not that
because I can’t afford to get it fixed! I’ve
always liked Nissans but if I can’t trust it to
not break then I don’t know if I will get a
Nissan again sadly.
Any help is appreciated!!!!!