Depends on the map situation:
(1)If you have sea food(s) and start with fishing make wboats for the first 2 clam/crabs or the first 3 fishes before all else. Make

rich land a priority over anything other than hooked sea food.
(2)If you have Quetchas and do not presume isolation just build quetchas and snatch workers/cities.
In the same logic if you have any of the rest of the resourceless UU tech to it making warrors/scouts to explore unless theres gold/gems/silver/furs in your BFC that could speed the techs up.Then just snatch worker / cities like above.
(3)Otherwise if your worker will have sth to do (other than roads) including techs researched in the meantime just build him.
Almost always try to choose city locations that give extra hammers in the city tile regardless if they are plain hills or a weak

resource like stone/marble/ivory more so if you can capitalize on the expansive trait.
In other words workers are fine at size 1. Settlers however really to follow after workers as most tiles initially are at best 3

+

max. And they are expensive, so waiting until you approach 10

+

surplus for them is better.
I wouldnt wait to grow to happy cap to build a settler. If the next workable tile will give just +3

+

(unimproved or mostly commerce i'd hurry the settler. For settler #2 (i.e. city #3) i'd really wait for a strategic resource though.
Chopping is nice and you may have to resort to it to improve your second tile. However chopping needs the rather expensive BW and i cant imagine the map setup where it would come before improving 2-3 tiles first. Better left for size say 3 with those tiles improved to finish up the first settler.