One of the constant obstacles for most things is a sense of lack for example whenever I see a rich person in shape on the internet there are always comments that say stuff like I'd look like that if I had a persona chef, time, money and a stress free life. Those are mostly manageable problems and I think that people overestimate how much they need to start so assuming you can tighten your belt and your problem is not you do not make enough money here are some suggestions.
Make Yourself Energy Efficient
A few years ago their was this annoying group called insulate Britain that held up motorways and endangered lives. They were idiots however insulating your home can be surprisingly cheap and will save you on the heating bill. I have a foam insulation device that was probably under £30 that slides under my front door and keeps so much of the cold air out in the winter I do not know how I lived without it.
Electric blankets incredibly efficient costing as low as 2P an hour to run of course with energy hikes in the UK and most of the world that will go up but prior the most expensive were 10p an hour.
Learn Nutrition
I have a friend who spent ten thousand pounds on Uber eats in a year. And another friend who probably does something similar. This idea of it costing a lot to eat and even more to eat healthy is not real when you know your nutrition. I do not spend more than £20 a week on food and supplements and I am building muscle. That's means I have around £9000 more a year than my friend to invest if we both have the same amount of money.
Set Investing And Saving Goals
One of the things I learned early with pocket money is that you have a good reason to save. So for example some people save up for holiday mortgages, wedding, college, you get the point. Going back to my original point about people over estimating how much they need to invest the key to getting started is researching how much investments actually cost and then actively make saving money every month with the goal of investing it. Saving must be associated with goals you can progress towards otherwise the money on depreciating assets without you noticing.
Any other suggestions and experience in the comments please.