Question for algo traders

Whats some advice you would tell your younger self? Things you wish you knew when you started. Ive been curious and always wanted to try and make one, even if its just for fun and never used. Only issue is I have no idea where to even start. Im no coder, so coding one is out of the picture. Are people using AI to help them or what? Any advice on where to get started, tips and tricks, where to back test would be greatly appreciated. ❤️