Krita is an Open Source suite for artists, directly competing with proprietary tools used in the industry such as Clip Studio Paint.
Unlike Gimp, which is an image manipulator, Krita is made for creating and refining art. It also has support for Vector layers, making line art more efficient. Combine this with Andrea's answer for generating vector graphics ...
Since you can draw well, you can scan your comic stripes, then with a photo editor extremely enhance the contrast so to have it in pure black and white (open source software for this can be gimp, cross platform, or paint.net.
When you have your polished picture you can use a tracing tool that converts a bitmap image to a vector drawing (I use potrace from ...
I would recomend Inkscape or gimp for free ( illustrator & photoshop alternative). I use Afinity photo & designer each cost around 50$ if you can afford you will love them. Don't forget to send some comics as treat :D
I think Krita is a good option.
Krita is a professional FREE and open source painting program, and has Brush Stabilizers.
It's available for Linux, Windows and Mac.
You could see the full features in https://krita.org/en/features/highlights/