Lost around 15% of my savings to gambling across the course of 14 months. I decided to quit gambling and look towards investing

Lost £4800 gambling across the course of 14 months. As of today, I have £25,000 savings left. I came to a realization, that I just can't live a normal life gambling anymore. It's destroyed and demoralized me - I said to myself the only way I can win is to quit. And so far I'm clean 6 days which is a miracle.

Now comes the new thoughts and the adventures I want to take that I haven't taken before. I want to finally look into stocks.

Is there any recommendations on where to start? I understand there's risk associated with stocks too but any advice on how I can get started to build a long term portfolio?

Any ideas would be appreciated.