"Let's start" is a grammatically correct and commonly used phrase in written English. For example: Let's start by making a list of items that need to be purchased for the party.
"Let's start from scratch".
"Let's start learning English.
"Let's start with eggs".
Let's start".
Let's start with Underpants.
Let's start subclassing!
Let's start with résumés.
Ludwig does not simply clarify my doubts with English writing, it enlightens my writing with new possibilities
Simone Ivan Conte
Software Engineer at Adobe, UK