Welcome to the forum. No need to apologize. Feel free to start a new thread for any other questions you may have.
I believe you can accomplish this configuration, but it may be a little tricky to setup.
You’ll want to use insert routing and follow the instructions for a Wet/Dry/Wet setup here: https://cdn.eventideaudio.com/manuals/h90/1.5.2/content/setup/wet-dry-wet.html
In this scenario, the main path is the stereo wet signal, and the dry path is determined by where insert 3 is. You still have another insert path to use here, so you can use inputs/outputs 4 for the drive and compressor pedals.
If you follow the routing examples, you can use parallel routing to have a separate wet and dry path. Put Insert 2 (drives/compressors) before Preset A, and Insert 1 (dry amp tap) after Preset A. Make sure that Insert 1’s mix level is at 100% and this will prevent that signal from being mixed back into the main stereo path: https://cdn.eventideaudio.com/manuals/h90/1.5.2/content/setup/wet-dry.html#wet-dry-examples
Let me know what happens.
