People talk about the lack of fuel, but Hydro power was initially built in September 30, 1882. It further scales to plenty of energy to bootstrap a civilization to modern extraction techniques. 15.8% of total global electricity comes from hydropower there is a vast amount of it even if oil and coal where somehow unavailable.
It’s likely they would end up with a strange mix of technology in the short term and a different mix of infrastructure long term. Stuff like steel sailboats with small wood fired steam engines for radios.
Biofuel can provide most of the roles of coal and oil. The rest could be obtained from cracking the gigatons of plastic trash.
We could be doing all this now, it's just not economical.