Ok so there are two sources I think you should look at.
Right Concentration by Leigh Brasington. ebook you can find online or pay for. Here is his jhana checklist: http://www.leighb.com/jhana2do.htm
Then if you really are going to put in the time the best method that I used to get to 4th jhana is the retreat recordings :
Practising the Jhānas by Rob Burbea : https://dharmaseed.org/retreats/4496/?page=1 and transcript: https://drive.google.com/file/d/1VFtEWc9ARmRckElM01Z-yLWeptAodLGG/view?usp=sharing
This is by far the best way to learn because it will tell you everything and I think his energy body teaching is one of the easier ways to develop Piti. I still look at Leigh's book from time to time as a quick reminder but Rob's stuff is at the heart of most of what I am doing.
Good luck and keep us posted on how you are doing.