I have used pretty close to max VG (outside of flavoring) when I first started vaping, as I am sensitive to PG in all but the most minute quantities. You can use high VG juices in MTL setups, it's just really important to prime things well and before I added DW I pretty much got into the habit of inhaling a few seconds after the fire button, to keep things wicking nicely. The main thing is to not overheat your tank, so maybe airflow a bit wide open, and I did have somewhat shortened coil life due to gunking factors.
My vape improved when I added 10% Distilled water to the vape, and I did it reluctantly and mainly to lower the temps in my tank, as VG has such a low boiling point. I was surprised at how much it improved my vaping experience... I mean, I was expecting lower temps but wasn't expecting flavors to improve, or increased coil life, which both happened (possibly also due to the fact that my tanks didn't get as hot). I would suggest trying some DW at different percentages (but not more than 10% to see if you prefer things with some DW added.
You also have the option to try out PEG400 in your vape, although you'd probably need to be doing DIY to try it. It's a PG variant that isn't used as much in vaping as PG became the "standard safe alternative," although from my research it appears PEG400 is perfectly safe to vape with. I tested some to make sure I wasn't sensitive to it and just mixed up 1100 mls of it. It's steeping before I try it, so I won't be tasting for a few more days, to leave some steeping room. From what I saw the main issue with it is that one can become sensitive to it, similar to PG, but if you can tolerate it it's a viable alternative, and some folks think it carries flavor better than PG.
But, I'd say do what you are comfortable with for now and I was certainly able to vape MTL tanks (including the N2 and others) at max VG and still make it work. It requires some different techniques, but I would encourage you to at least experiment a bit with adding distilled water you will likely overall benefit from doing that.
Best of luck
Anna