This isn’t exactly what you asked for but just in case it might interest you; I ordered this Aoostar WTR Pro recently to replace an Odroid that died on me. It has an intel N150 and lets you install whatever OS you want. I’m pretty happy with it so far.

Paperless-ngx - it allows you to upload important documents like receipts, contracts, etc. and uses OCR so you can search them

To go along with that, Telegram doesn’t make it easy to set up an encrypted chat. First, you have to set up a regular chat, then tap on the profile image of the person you are messaging, then tap the 3 dot menu, and finally tap “secret chat”. It’s there but they clearly don’t want people using it.