I don't speedrun this game but there are some guides here. Also, simply watching more recent speedruns is a good way of learning about new strategies for missions or coin routes
This isn't necessarily a tutorial, but Saiyanz has a good video describing tips and tricks to know and practice before doing runs. Not up-to-date since it's from July 2017, but it's still a good one for beginners:
It's also recommended you join the SH&R Discord for any questions and other things you have relating to running SH&R: https://discord.gg/0Yr4neTLlPveK8vr
Here's some other useful tutorials/routes: https://pastebin.com/3MCG9ZcE - Beginner Coin Route - Sadly's ASM Tutorial for Level 1 to Level 3 (No video of his for Levels 4-7)
After a lot of consideration on many factors over the past couple of weeks, the mod team have decided that the best course of action is to allow the custom save file to skip the Bart 1, Apu, Bart 2 and Homer 2 cutscenes. This save file is banned in No Mission Warps, with the goal to maintain the sta