I’m still not sure what it is you’re asking. If by “finding” you mean
finding sources for your music: search engines are your friend. Your tastes are likely not so exotic they will exist nowhere else on the net.
procuring the media themselves: borrow CDs from the library / friends or buy and rip them. Buy digital files. Procure them in… other ways.
accessing the files you own to your devices: USB / cloud transfer. Self-hosting and streaming to your devices (see my OP above).
If you have really never assembled a library of music you truly own, start now, and start small. Don’t let the large number Spotify gives you trick you into believing you need that. Realistically, you’re not listening to a fraction of the 7k songs it gives you all day every day. Focus on the albums/artists you really cannot live without, and once that is settled, branch out to the more exotic parts of your playlist.
I’m still not sure what it is you’re asking. If by “finding” you mean
If you have really never assembled a library of music you truly own, start now, and start small. Don’t let the large number Spotify gives you trick you into believing you need that. Realistically, you’re not listening to a fraction of the 7k songs it gives you all day every day. Focus on the albums/artists you really cannot live without, and once that is settled, branch out to the more exotic parts of your playlist.