Hello

1st of all. Í´m no doc. So I can only tell you what I know. And that information isnt 100% accurate, but you can take this as extra info.

Unfortunately RLR, the one who started this site, already in his 90´s  hasnt been present on the side for over a month. We dont know whats wrong with him. On the allexperts page you had Doc Richardson, but i´m afraid that something has happened to him too. He was already 84 so two great man who helped a lot of people maybe arent among us anymore. Having that said. I will try to help you a bit on your way.

Sinus arrhytmia is no problem at all. And is noticed in young people also. Normally this is a sign of a healthy heart reacing upon breathing in and breathing out. bradycardia is often found in elderly people and sports people at night and sometimes even during the day. Not really a problem as  long as its not too low. 33 is just ok although slightly low.
a first degree av block sounds scary but for all I know and read this isnt dangerous. Its even seen in healthy people. Right bundle block is often very common.  but in combination with 2nd degree wenckeback you should ask if this is a problem somewhere in the conduction !
in the literature it is said that..Second-degree heart block is broken down into two categories: Type I and Type II.

Type I heart block (also called Mobitz Type I or Wenckebach's AV block) is the less serious form of second-degree heart block. In this condition, the electrical signal goes slower and slower until the heart actually skips a beat.

So ask if you have a type 1 heart block !!

if the ectopics are a problem with 2nd degree av block i´m not qualified for to give a good answer..

So the thing that sounds the most urgent to ask for is the 2nd degree wenckeback.. and 2:1 3:1 block occuring at night