no vertical stabilizer air crafts (atleast what ive seen) are quite unstable. a nice trick is to put a a vertical stabilizer anyways, and then use overload to scale it down to a damn near invisible amount.

and as for curves, you should learn the fuselage block and manipulate it effectively.

take inspiration from other builds and irl aircrafts and then later build your own.

Enough thrust and anything should fly.
Be warned, the most advanced airplanes on the site are not engineering so much as they are game development. They’re full of code and very complicated math to make a flight model; they’re not really SimplePlanes aircraft anymore.

Damn, I mean. It isn't exactly something you learn overnight, tbh. It took me 6 years just to get to where I'm at and I don't even consider myself pro yet lol. I'll tell you this, though: experimentation is key. Play around with different parts and build methods. Look at reference pics and practice trying to replicate the shapes and curves. One thing I keep trying to teach myself, though I never learn, is that your builds don't have to be perfect. The builds you see here on the site, the ones that look ridiculously smooth, no imperfections whatsoever, take years of practice to pull off. You can start of simpler, like me. Not trying to promote myself here, but have a look at some of my examples.

Osiris A little less than 2 years ago, I was still building my fuselages out of whole parts. No paneling, no slicing, none of that. You can still make nice shapes without getting fancy, but it can only get better.

Osiris II Paneling was my next "level up." If you don't want to get too fancy with part slicing, you can use panels to sculpt out the shapes that you want. I used a little bit of left/right slicing to get my panels lined up properly, but they're really just rectangles and squares.

Taranis Rex Now, part slicing, is where it can get a little funky. I've only used it once with this build. You use big fuselage parts, sometimes with lengths and widths exceeding 4-5, and then slice them into the shapes that you want. It can be tedious and tiring, but 9 times out of 10, the results are worth it.

So, my honest advice? Start off like me. Start with making fuselages using simple shapes. No paneling, no slicing, nothing. Once you think you've got a hang of simple fuselages, move on to paneling for more complex shapes. Experiment with curves and stealth shaping. Finally, once you've learned paneling, you can experiment with part slicing. If you want, you can take some of my builds (90% of them are mobile friendly, just watch the performance cost) and study them. Or, you can hit me up for help. I already taught my friend @EmpressAndressia, I wouldn't mind becoming a mentor once again. Just keep experimenting and don't quit.

@Zanton1cAerospaceTechINC
Those aren’t even (@OverlordPrime) expert friendly.

I know

Those are not exactly beginner friendly