Step 01.

Click the three lines in the upper right corner of your screen.

Step 02.

After you click the three lines a pop-up will appear, it will say “Search” “Duplicate” and “More”, the “Duplicate” one is the one you're gonna press

Step 03.

After you click duplicate another pop-up will appear and for that you just have to pick your workspace (which I'm not showing for privacy reasons). But after you click your workspace this pop-up will appear and after it's done it will be in your notion workspace and it's all yours to do whatever with.

And after you get it to yourself, you're allowed to delete, add, move, stuff and do whatever to this template since it's now yours, just make sure you're on the template you duplicated and not the original one.