I bought the paper from viral surf. It doesn't have ant visible fibers. It's hard to find.
You have to tape it to regular print paper to run it through the printer.
Keep building, stick with resins and materials you are comfortable with. It's mostly about knowing your materials.
I've tried a few epoxies and find easy composites UK laminating and xcr coating epoxy outstanding. No blushing.
Keep your work area clean and even temperature.
If your shape is not good, boards not going to be good looking, but might work fine.
Plan ahead and think through all your steps before starting a build sequence. Write them down before and memorise them.
There's some good you tube videos on glassing.