How do you make a custom mob (like a dragon)

Its quiet easy to make a mob but its really hard to make a entity taht you can ride and fly on, i think its impossible too :/. But imma tell ya how to make one, first you need blockbench (https://blockbench.net/) after you installed blockbench you need to make a new modded entity, give it a name and a model indentifier, after that go to the top of the screen and youl'l see "Filter" click on filter and then on "Plugins..." install the bedrock entity generator and select the dragon model (YOU NEED TO CHECK THE "MAKE THE MODEL BOX) after taht play around, make a texture and after you are done, right click on the texture and download it. As for the model go to the top of the screen and click "File" then "Export" (NOT IMPORT) and then "Export Java File" then find the texture and the model on your desktop, drag it into mcreator, put animations for the dragon and for the texture set it to "Other" After taht make a new mod element and select it to be a "Living entity" the rest is suppper easy, i think i do not have to explain it. Cheers" (also this is the most basic stuff, you also got pivot points, procedures, entity tasks  and all of that)

I suggest you check our tutorials collection playlist on our YouTube channel which contains many examples and tutorials that can help you get started with MCreator: https://www.youtube.com/playlist?list=PLAeL-oIFIEngE6jRgFYeFMfuj8WQsO3Ei

Its quiet easy to make a mob but its really hard to make a entity taht you can ride and fly on, i think its impossible too :/

This is not right, this is doable by all means in MCreator. Please check https://twitter.com/PyloDEV/status/1260234919239987201