Beginner here with some questions

Disclaimer: English is not my first language so I’m sorry if I don’t explain myself well. I’m also not very good with the correct technical terms, so bear with me please.

A little context: Hi everyone, after starting to read about mew some days ago, I began practicing it 2 says ago, but it’s been hard. As a chronic mouth breather since childhood with a stuffed nose all the time, after reading all these articles about mewing, I realise that mouth breathing has affected my development a lot after reading about mew. The fact that I’ve never had my tongue rightly positioned all my life is probably the cause that I had so little space for teeth in my mouth and had to take some and use braces for years and other facial issues. After two cirurgies to straighten my nose septum (which caused me to snore and breath badly through my nose), I still have problems breathing through my nose while I sleep… I always sleep with open mouth, which affects my dental health, my throat and makes the quality of my sleep and energy through out the day very bad and makes me snore. So I hope that mewing and night mouth taping can help me with that. Thanks to my “mouth breather” development, this tongue position doesn’t come natural to me at all.

Problems/Questions

1- I have what they call an “deep bite” where when my posterior teeth touch (as in biting or resting close mouth), my anterior front teeth are not on the same line. My upper incisives get in front of the down incisives. They don’t match. It’s similar to this pictures: 

 

 

 

(more like the first one)

Should I do mewing with my open bite natural position or with the incisives matching (getting my down incisors to the front so that they match the upper ones), which is uncomfortable and unnatural to me?

 

2- I’m not entirely sure of my tongue position… sometimes I can’t be sure if my whole tongue is resting on my upper palate. It’s like I can’t feel it all and it’s like the cavity of my upper palate is too small for my tongue. I usually say the letter “n” to find the position of the tip of the tongue, swallow saliva and apply suction to the tongue and the tongue seems to be stuck there. I have to make a big effort not to clench my teeth though. Is this right?

 

3- Should I deliberatly apply force in the tongue or just relax it? If I relax it too much it gets out of place.

4- When I mew I produce lots of salive (more than normally) and have to swallow it all the time. Is this normal?

Thank you in advance and have a great day!

 

Edit: corrected “open bite” to “deep bite” which as Apollo pointed out that’s the type of bite I seem to have.