Reading through all this, don’t discount LinkedIn. People often misunderstand it as just being for work on finding a job (I know someone who used LinkedIn to raise $1million to open 4 restaurants purely by making good use of his network.) It’s meant for networking. For instance, Id get your name in front independent house building companies with a view to supplying them regularly with underfloor heating, that kind of thing. I see posts every day from people saying “Does anyone know a good XXXX…” - then your reputation speaks for itself in the comments when people tag you as being a good XXXX.
Neil Patel (A well known expert in SEO) gives a pretty good argument for using it.