Modding is not hard to do, it just takes time to read through posts and the documentation. If you can follow a recipe on how to make pancakes you can mod. To get SH5 to behave you
have to mod. Look at Sobers mod - it works and he has taken the guess work out of it.
TDW mod fixes the sinking sub problem (which is part of Sobers mod (which is actually a collection of various mods)).
If you sit down to eat an elephant you do it one bite at a time is all. You can do it.