Basic tips on job portals, identifying scam jobs.

Hey all! New to the subreddit so forgive me for asking old questions.

I’ve been freelancing since Covid-19, and had some recurring assignments through contacts, but now I’m in a place where I have to start fresh and look for substantial work. I would ideally want a full time remote job, but beggars can’t be choosers so I am open to short term projects and assignments as well.

I have been seeing some websites, applying for jobs (some turning out to be scams), but I’m worried my mind is going all over the place and I’m wasting time versus being efficient, so wanted some advice on:

1. Best websites to look for work; at the moment I’m going through LinkedIn, Indeed mainly. Got introduced to Micro1 and Mercor but haven’t checked them much as of now.
2. How to identify as much as possible, if a job/company is fake or a scam.

Thanks as any help is appreciated!