We all change with maturity - some more, or quicker than others!
I note that you are considering both psychology and criminology. Both, in a way, investigate how people work, and form an understanding of their motivation. If understanding people is a key thing, then other areas may include (say) social work or, say, politics and policy making? Teasing out what is the thing that motivates you is an important first step to finding a plan ahead.
What I think might then help is to take the skills and knowledge that you do have - e.g. from the hospitality industry, or your degree (or both!) to identify the areas that both tickle your underlying interest and where you've got some existing experience that you can leverage as well.
It's not at all rare for mature students to return to university for just the reasons you cite, and when they combine exploiting where they are now with a clear goal they want to achieve, they often succeed well.
I appreciate that I may be about to suggest something that might not in fact be of interest to you, but let me demonstrate one possibility through a topic I do understand. Another option might be human-computer interaction, which is primarily psychology, but has some relationship to computers. The sort of skills you need in that area are both an ability to understand other people's goals and thinking, and an ability to work communicate that understanding to developers and designers. I suspect your technical knowledge and, I guess, your people skills from being in the hospitality industry, might be clear benefits to you if you graduated in that topic. (similar principles, I hope you can see, can be applied to all the other examples too..)
If you want some feedback, arrange a chat with an admissions tutor or two for potential courses, and also go and have a chat with a few relevant people who could employ you after the degrees you are considering. That will, I think, help you get feedback on your potential, and assess what options are going to be best for you.
I've been an admissions tutor for a while now for MSc programmes, and if you contact me offline or here, with an idea of possible areas of interest and your geographical constraints, I may be able to suggest a few more specific things - e.g. psychology is quite a complex area, and it may be that you need a more cognitive department (like, say, UCL) or somewhere that has a stronger focus on theraputic practice (often in a clinical school) - that might help you focus your options on something that gives you a clear benefit for your future as well as an opportunity to prove yourself.
In any case, all the very best!
George