Thanks so much!! I definitely plan to continue working on it!
For the dino idle/walk animations I actually started by drawing the frames on paper and then digitized them with Krita (free art program) and polished it up after converting it to pixel art (which was kind of a happy accident cause I exported the Krita animation as a gif, which dropped the resolution so when I imported it on GameMaker it was pixelated, but I really liked the look). For all the other sprites I actually just used the built in sprite editor in GameMaker. It's pretty simple but it worked for me!