[SpyRemo]

I want to know if I am doing ghusl properly. This is what I am doing:

1. wash hands thrice then private
2. do wudu (except for feet). When doing the rinsing of mouth and nose I have doubts if I have done it sufficiently and correctly so I do these parts 7 times and rest of the wudu parts 3 times. is this ok?
3. then wash hair 3 times
4. wash ears 3 times, then neck 3 times
5. wash right side of body from neck down to feet three times, then same for left side
6. wash feet again (3 times)

I want to know if doing the above would validate my ghusl as I always feel doubt in my mind if it enough.
I dont know how to gargle water to base of throat for the mouth washing requirement, so I gargle to the point where I gag and almost swallow the water and each time I feel that I didnt reach the base of the throat so I do this the max times (7 times), is this ok and correct?

Also for the requirement of washing body once, does that mean I need to wash the right side of face, ear, neck and body and then same for left or is the above method i do ok?

Please advise.

Since I feel these doubts, I feel doubts if my ghusl is valid as so I sometimes miss my prayers due to this.