Meaningful Money has YouTube and Podcast. Plus there is a book - The Meaningful Money Handbook, which the last 1/3rd of it is about investments using ISA and Pension wrappers. Another book is due out late 2025 about retirement planning.
https://meaningfulmoney.tv
What sort of information are you after?
In your thirties, not working many hours, what are you able to do towards retirement? If you have an employer, then join the workplace pension scheme. If you don't earn £10k+ to be auto-enrolled in the workplace scheme, ask to Opt-in. If you earn under £6396 they may refuse, due to not having any "qualifying earnings".
If you are self employed, you can use a Self Invested Personal Pension. Some providers start from as low as £25 per month, whilst others may want £100 per month. Have a look at: Dodl, Hargreaves Lansdown, Vanguard Investor.
Aged under 40, low earnings, consider using a Stocks & Shares Lifetime ISA. You can put up to £4000 in per tax year until age 50, it gets 25% bonus added when you pay money in, and is tax free on withdrawal from age 60.
For money that you want accessible before age 60, a Stocks & Shares ISA is useful.
Try to keep things as simple and as low cost as possible.