I NEED HELP! explain to me how you would load up a old autosave of a project in unreal like i am 5.

the project i lost i was working on for about a month and i worked on it every day! Its a architecture project for class, and is INCREDABLY detailed, so needless to say i really can’t lose it. the thing is, i am very new to unreal, and i think the reason i lost it is because of improperly saving it. but anyway, i need someone to walk me through or something on how i can load the project from a autosave i have. and the autosave is the only thing i have of the project (i think anyway) PLEASE HELP!!!