To send messages or media to yourself, open your personal storage chat. You can access everything you send to this storage chat on any number of devices you own, including your PC.
Go to Settings > Saved Messages.
Open Main menu > Saved Messages.
Click on the menu button in the top-left of your Chat List > the Bookmark icon or your profile picture.
Tap the Search field at the top of your Chat List > Saved.
If you have a username, the following link opens a chat with you on Telegram: t.me/YourUsername.
You can also create a private channel, choose a title, and add a picture. Use it as a separate place for travel photos, music collections, recipes, etc.