You're going to need plans for a Small Water Purifier, a Little Generator and a Medium Generator. All these can be unlocked once you maintain and defend your first Workshop with Fallout 76 Items. A simple one to take on your own is your Gorge Junkyard involving Flatwoods and the Morgantown Trainyard (head north from Flatwoods on the road by the Overseer's Camp).
Mutfruit and Tatos can easily be found in Flatwoods, which is ordinarily the very first town players achieve when starting the match. There's a community garden along the street headed out of town (Route 86 moving west across the creek) in which Mutfruit can be harvested. Across the street from that backyard, in a dirt lot behind a house, are Tatos which also is harvested.Corn is warmer, but a surefire place is a backyard out Morgantown Airport, another low-level area accessed early in the match. It is here (the bracketed arrow pointing down in the screenshot below).
You'll also require Fertilizer. Whenever you have only one of each vegetable, also only 1 Fertilizer, you are able to plant it in your CAMP. Any food harvested can be replanted to create more plants, but you can normally purchase six Corn, Mutfruit and Tatos from the trips to the Airport and Flatwoods.
Build up as large a glue garden as you prefer, but recognize that excess crops left in will spoil over timestored on your Stash Box with fallout 76 weapons. (Although 10 Spoiled Vegetables, or 10 Spoiled Meat, can be smelted in a chemistry table to create Fertilizer; Fertilizer may be broken down into germ, which is necessary to craft Gunpowder and therefore ammunition.) From the task to reconstruct Appalachia in Fallout 76, your CAMP will be your very best friend. This base-building device permits you to create buildings and workshops, but also functions as a free fast travel point. Playing Fallout 76 without a CAMP whatsoever is placing yourself.