Have you tried figma.com? It’s web based and in many ways even better than Sketch app. I personally stopped using photoshop for graphic design long time ago and never look back
Figma is great, they have very interesting ways of solving problems, through rethinking from first principles of what makes a feature interesting or useful for the end user.
This looks fantastic, they are properly innovating and not just trying to be a web version of sketch. I just looked into how paths work (pen tool), and it is finally exactly how I originally envisioned they would work when I was first introduced to them decades ago. I never fully understood why the pen tool had a surprisingly high learning curve and general awkwardness. I assumed it was to meet some specific high-end needs of pro designers (I am an engineer first). Figma seems to be showing otherwise.