Read "How to win friends and influence people". The book is older than you and has been studied by many great men. This is a "manual" on human interaction, something us "geeks" can use, to present ourselves in the best light. Are you applying for suitable "high level" jobs? If you are a certified "grey beard", but are applying for entry level positions, then forget it. By definition you are the wrong person. You need to put yourself in the position of the hiring manager and see how your 6-digit salary will actually save them money. Second, most of my auto-didactic friends are consultants who have found a niche: cobol, mainframes, pdp-11/vax, as-400, etc. All based on resume, reputation (i.e. recommendations), and word-of-mouth. Old computing niches aren't sexy, but they are desperately needed and pay the bills. Once you get your first gig, if you present yourself well (see book above), then others follow. I don't know your niche
... but there are hundreds of business out there that are willing to pay thousands of dollars for you to fix their problem.