Question on Bitachon (Trust in HaShem) and becoming more religious

Shalom Alechem brothers and sisters. I hope all is well with you guys. Recently I have been have some struggles concerning my trust in HaShem, so I decided to consult my Rabbi on the best way to tackle this issue and better my trust in Him. He advised me to learn about HaShem’s intense love for each of us individually as Jews and His overall intense love for the Jewish people as a whole. I was wondering if any of you could point me in the direction of any verses in Tannakh, Talmud, rabbinic works, etc. that speak about HaShem’s love for us as a people and for us as indivdual humans.

My second question is more directed towards people who are Ba’al Teshuva or anyone currently making the effort to become more religious. The only reason for this is because I’m assuming people who were born into already religious families most probably aren’t very experienced in this particular area. How did you come to peace with yourself giving up previous habits that, in religious terms, aren’t healthy? I find that the more commitments I make, the more I find myself looking at what I gave up rather than the new mitzvah I am now participating in.

All answers are appreciated, thanks so much!