Should graduate bachelors next year, where to go from there?

Throwaway account.

I'm currently 25 and one year away from graduating from BSc Hons Comp Sci at a former poly at the bottom of the league tables which I chose because I wanted to live in London. I've been nerding around with computers for 20 years and programming for 10. I'm from the (very) North West having taken a few years out of education one year either side of the pandemic. I have enduring issues with energy and concentration, I believe that my current circumstances understate my ability, but of course I wouldn't be in this position if I could apply that ability

After blowing up my dissertation last year I've managed to get it deferred to this coming year. I'm probably just going to pick something off their list of suggested projects, instead of something that sounds cool yet I won't be able to get off the ground at all. However, if and when I finish my degree I am worried about the state of the industry in Britain when it comes to junior or graduate positions. One of the things I worry about is that I haven't specialised in a particular area but I don't know which ones will be a) in demand and b) fun to do for a job. In an ideal world I'd just have a job where I did what I was told. Unfortunately for me the way my brain works, if it isn't fun to me you couldn't beat me into doing it. Have been trying to fix that for years and still haven't figured it out.

I am absolutely not up to scratch with any of the agentic LLM stuff. I find myself regularly repulsed by gen AI words, images, sounds, users, developers etc so I feel like I'll probably find AI generated code to be the same. On the other hand, I haven't got to try it yet, as I find it difficult to invest money and time on what seems, at the present, buggy, untrustworthy and wholly proprietary tools.

My questions are:

Where is the best place to find job advertisements for the UK industry? Is it LinkedIn? Is Stack Overflow Jobs any good? Do I need to fit out my entire LinkedIn page before I start applying for things?

Do open source contributions carry much weight these days and should I bang out some more personal projects for my GitHub page?

Over the years I've done personal projects and courseworks in a fair few areas:

• Front-end web and desktop applications: P/React, Vue, Svelte... raw CSS with BEM, Tailwind, Bootstrap... Qt. I'm no designer of course
• Back-end/network applications with Node, Python, Java, storing data in Postgres, SQLite, Redis
• Systems and high performance with Rust and C++, efficient data structures & associated algorithms
• Cryptography and secure systems
• DevOps and assorted cloud stuff. I have a git repository full of terraform and ansible playbooks and the like for running some self-hosted things. My current task with this is to get into deploying Kubernetes on the Oracle cloud free tier and shifting all of the apps onto that.

Which one of these areas would folks recommend I spec into for the best chance of landing a graduate/intern/junior position? If it goes off geography I'd be happy to live & work anywhere in Great Britain excluding Manchester.