If you're really interested in making your simulated flying realistic, you should read the FAA's Airplane Flying Handbook (AFH). It has a pretty good explanation of most of the info you're asking about.https://www.faa.gov/regulations_policies/handbooks_manuals/aircraft/airplane_handbook/
Re. taxi speed, the AFH has this to say:
Normally, the speed should be at the rate where movement of the airplane is dependent on the throttle. That is, slow enough so when the throttle is closed, the airplane can be stopped promptly.
35kts is probably well beyond the point where your rate of movement depends on the throttle position.