The Arbatel - Pre-work and preparations and modifications

[Snakesandsuns]

Hello all of you interesting folks. Through the various strange turns of life I have become interested in the Arbatel. I have had other projects but am currently reading it (Joseph H. Peterson translation) and plan to read it again more slowly in the future. I had originally been excited to read it along side the Arnemancy podcast and see how a pagan/hermeticist modified it, but from the looks of it that project is defunct.

As such I come before you all with some simple questions (only 4, not 7, I apologize)

1. What pre-work/reading/practices do you recommend for success. I have been meditation and had done some scrying practice in a non summoning context, just concentration. I have never actually invoked so the Arbatel will likely be my first experience.
2. What preparations to you recommend? For example I was thinking about fasting and making the sigil myself (starting at the hour and day the previous week),
3. What modifications have people done? I am not a follower of Jesus or the god of the trinity (no beef though). I do appreciate some of the wisdom of the bible but I also find that in all religions. I am a pantheist, hermetic, druid... thing? I would find it insulting to Jesus to pray to him without being a follower. What modifications to the prayers have any of you done? How successful was it?
4. What Olympic Spirit is recommended to start with? My goal is more to have a 'experience' and to learn more about the nature of Nature & the Divine.

Thank you all for your time.