I don’t know much about it, except that there’s a lot of contention surrounding cooking oils, and the health recommendations change routinely.
The only fats I use right now are Butter; Olive Oil, for salad dressings and cooking; sometimes Coconut Oil for cooking; Sesame, for flavoring; Peanut Oil for deep frying; and, oh - I keep a ton of lard in the freezer, and save all my bacon grease.
(I have one recipe for Carrot Cake that I haven’t made in a long while, which called for ‘vegetable oil’; then I changed to Canola - which by some lights has problems of its own - and I have no idea what I’ll use the next time I make it :-)
But if you do a search on ‘is corn oil healthy’, you’ll find lots of opinions/information.
You are doing it right. All the seed oils are very bad for the heart. We always get omega 6 oil (eating out, meats, etc) and we need to NOT cook with it at home. Coconut oil for cooking and olive oil for raw are the oils, though many recipes do need the Sesame seed oil, used sparingly as it always is. And of course butter, tallow, lard from healthy animals are great. Duck fat. French fries in duck fat. One day....
I’ve been using sunflower oil for awhile now and really like it for high temps.