HO COMPRATO SU MONSTER TEMPLATE UN VIDEO HD AL QUALE DEVO APPORTARE ALCUNE MODIFICHE,SOLO CHE QUANDO LO CARICO LE IMMAGINI DEL VIDEO NON ME LE CARICA,E MI DICE CHE MANCANO ALCUNI FONT SPECIFICANDOMELI....NON SO COME FARE
If you get an error message that fonts are missing, go back to the template page where you got it and look to see what fonts they say are used. Usually, template pages will link to a place to acquire any necessary fonts, but at the very least they should tell you the names of all fonts they used.
I do not understand the first part of what you said. Please explain with a lot more detail. Pictures and screenshots might be helpful.
After Effects is not easy to work with if you do not have experience with it. Even templates that seem simple can be confusing. I usually recommend that people new to After Effects start here: Getting started with After Effects