Dear Gurumaharaja,
Please accept my humble obeisances.
All glories to Srila Prabhupada.

HpS - Thank you so, so, much for your Sankirtan service!!

Please excuse me for writing again about topics of free will, but I don’t understand some things and it seems somehow connected with understanding real identity of soul. Should I try to understand these?

HpS - From your general statement, yes, of course.

My understanding of soul is to be observer of what this subtle and gross body do.
I still don’t understand if for example desire to make specific project for Krishna and Srila Prabhupada is not just all how this subtle body is programmed to do. Is it really my desire?

HpS - 15%.

If me as the soul will be inserted in body (subtle and gross) of somebody else, will I will have same desire to do specific service, or will that be different or in case of bad body will not want to do anything useful at all? Will something change in that person live if there will be sitting different soul inside?

HpS - If you have a Hennessey Venom GT you are going to want to drive fast. If you are in a female body with female karma, vasanas from many lifetimes you will want to have a nice husband who loves you and protects you and your babies (FOR KRSNA).

Is it just that when we are fortunate to be engaged in devotional service, we as soul just observe how service is done (although it may be done by already programmed body, mind and inteligence) and by that soul starts to remember relationship which has with Krishna and real identity in spiritual world, thus wake up from all this?

HpS - Adau sraddha, sadhu sanga...  BG 4.10 purport. So many times Prabhupada paraphrases our spiritual development using this verse. In NOI (8?) he does it. I realize that I am not the sense objects. I try to serve Krsna by the little spark in my heart, "Brahmanda brahmita kaun.." but have to see it manifest in the sense objects, my mind. Jayananda Das was a mechanical engineer so he built Rathayatra carts for Krsna. You are a software engineer so you do Vedabase.io. If you were in a body like your good wife you would create the next Krsna conscious Emperor of the World. In the beginning we are just watching the service like children on father's lap 'driving' car, but as we get purified we contribute more by our choice, taste. This is our understanding.

Your servant Prahlad Nrsimha das

PS: I will send you Vedabase updates soon.