Heyy Scotty, I have a 2.0 2008 Ford focus se (front wheel drive), and I need to change the Engine…

Heyy Scotty, I have a 2.0 2008 Ford focus se (front wheel drive), and I need to change the Engine Crankshaft Crank Seal which I need to mess with the timing belt. Any tips or advice so I won't have problems with the timing once im putting everything back. First time doing this kind of work. I saw a tool that I can buy. I send you a picture. If I get it, would it help me?

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