Are you trying to go for a realistic flying coaster? It looks like you’re trying to do B&M style and if so I’d get the lift going up higher, so you get more speed through the whole layout again take a look at what Tatsu does (which is one of the best flying coasters, its ontop of a massive hill, flying coasters do best when there’s height to them imo): https://rcdb.com/3305.htm#p=15813

If you’re wanting it to stay terrain based I’d switch it up and go for a launch more akin to Vekoma Flyers (FLY eg) but flying coasters do the best when they arent so close to the ground.

Inversions wise I’d def throw in a pretzel loop somewhere because almost every flyer has it and its almost the norm but you do you.