Need advice for first time DIY patio

Hello and thanks for taking some time to read my question and perhaps respond with some advice. To start, here is what I am working with.



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In the picture where you can see the wall jet out a foot or so by the hose is where I would like the patio to end. It will be about 525 sqft. I have a bit of extra stone that I am in the process of moving over to getting a better base down where the patio will be. There seems to already be about 3-4 inches of it, will another 1-2 inches be ok/better/worse?

The retaining wall is not on line with the edge of the house and the angle that it lies on to connect them is graded down enough that if I leveled it there would be a rather large step at the end, unsafely so.

The corner of the retaining wall is curved and even where it is flat I have no clue what to do where the meet.

Finally, I have a crappy wooden step out the back door down to the stone that I would like to somehow blend in with the patio.

I don't think I will need any more base other then the leveling sand, and where I live the cost of living is very low so the I should be able to come in under $1000 for the patio stone I choose. I will be doing all the labor and I am hoping to finish it for $1500-$2000 total if I can.

Any information you can offer me would be great. I have no clue what to do other then what I have gathered from YouTube videos and would appreciate any suggestions and instructions. ASSUME I KNOW NOTHING!

Thanks so much for your time and replies.