I want to get my PPL, but I am learning why so few people get into GA without the intention of becoming a Commercial Pilot. Navigating FAA rules is exceptionally intimidating.

I am looking to get a Class 3 Medical before I start training because I don't want to spend money going after my PPL if I can only get a Sport Pilot license. I have some medical issues, but none that are untreatable, and until I found a thread in this forum I was not concerned. Now I am afraid of what I don't know because I don't want to fail a medical and be unable to even get a Sport Pilot licence.

Is there any way to "dry run" your medical to find out if you will qualify or if you will be flagged for an SI?