A bunch of people drop their OPSEC once they discover Nostr because of it's censorship resistant properties. My dude, while you are free to say whatever you want here without risk of censorship, you're government is more than happy to ID you and take you out if you paint a target on your own back. While you can opt for both censorship resistance and privacy, they don't come packaged together by default.
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Actually you have to fear the risk of censorship on nostr even more. Any relay your profile is connected to can remove your notes anytime any one of the relays feel like it. I've lost over a years worth of notes & I have to make backups because I can't tell which relay is doing it, why or get a answer from anyone on why this is happening.
Paid relays you haven't supported maybe? Not a problem if you run your own relay. There is also a service called nostrsync that will throw your stuff all over multiple relays.
I wish I knew how I could setup a relay. I would probably have to buy a vps.
So if you are looking for just personal backup rather than hosting a public relay for everyone, its actually quite simple to setup. I have a raspberry pi running umbrel and it has a locally hosted relay that i connect to one of my npubs. You also should try nostrsync.live and run a DeepSync which will go into a whole bunch of relays and pull old data. Some relays make copies of others so there is a good chance that running that will pull up your old stuff. Let me know how it goes.
Could you set it up on a android phone?