“Subsistence farming” (where the farmer and his family produce most of what they consume, and consume most of what they produce, with a relatively modest surplus left for trading) was the dominant model of farming in the Northern colonies. Likewise there was a good deal of domestic handicraft production, mostly for immediate consumption but with a surplus for sale.
But in the Southern colonies - then, the economically dominant part of the nascent US - they had plantation agriculture, with tobacco, indigo, rice and (later) cotton being produced on a large scale, mainly to be traded.
In both parts there were industries associated with agriculture - milling of grain, baking, butchery, weaving, etc, all of which used agricultural produce, and also industries like potash production (for fertiliser), blacksmithing, etc.
There was a timber industry, and a shipbuilding industry which made use of the produce of the timber industry. Shipbuilding was in fact the largest industry after agriculture. And of course there was shipping, whaling and fishing.
There was a limited manufacturing sector. Most finished goods were imported from the UK. Legal restrictions, monopolies, etc, constrained the growth of the manufacturing sector, and this of course was one of the proximate causes of the American revolution.
The total population of the 13 colonies is thought to have been about 2.5 million, of whom about 20% were slaves. The slaves, of course, excepted, the average standard of living was probably somewhat higher than in Britain. There was no class of poor, landless agricultural labourers (the slaves filled this role) and the colonies had a persistent labour shortage which kept wages relatively high.