if you have friends online or in your community, it always helps to see if they know of any opportunities
i've gotten both of my remote jobs from networking so far
other than that, embellish any skills you have from your other jobs that might apply to a remote one. are you good with deadlines? are you detail-oriented? a good communicator and team player? most remote jobs care more about these "soft skills" and will train you on what you'll be doing anyway
if you have access to a resource that will help you polish up your resume, write a cover letter, and work on interviewing skills, that'll go a long way. often, community colleges and similar orgs will have this. if you're disabled and in the US, consider looking into "vocational rehab"
last but not least,,, apply for everything you can, regardless of if you think you're qualified or not. you don't have to be the best and the job isn't expecting you to be. in fact, many of the items on their job postings are more of a "wish list" than a hard and fast set of prerequisites. apply anyway, and see where it takes you
best of luck, my friend <3