you can root any wood from a fig tree anytime to be honest. the only time you need high humidity is when the wood is green, like in your instance. The best way to root softwood cuttings is to remove all the leaves except the top 2 and cut them in half. add a slice at the bottom of the cutting and dust with rooting hormone. Stick your cutting in a 1 gallon pot or larger with a good draining potting mix. Then place a humidity dome around it, I use 2 liter bottles with the bottoms gone as a humidity dome. keep the soil moist but not the leaves thats what the dome is for. watch for new growth and mold. as the cuttings starts growing start twisting the cap off a little each week. if it looks like it's wilting replace the cap or tighten it back up ASAP. The main battle will be introducing the plant to lower humidity levels once it start growing.
Dormant wood contrary to belief don't need the high humidity and the use of humidity domes encourage leaf growth not roots. The use of high humidity on dormant wood makes it's so warm around the buds the plant breaks dormancy and pushes leaves using up all the stored energy in the cutting. Next the leafs goes through whats called transpiration, and if there are no roots to support this natural process the already exhausted cutting will die. people say oh you need humidity for your dormant cutting or it will dry out in the pot. well if people would use 1 gallon or larger pots and stop using little cups the cutting will be deep enough it won't dry out, "if the soil is kept moist". these little cups people use really erk me and they wonder why failure rates are so high it's called transplant shock, when you start with a trade gallon you don't need to transplant until the plant is dormant and the risk of transplant shock is gone. why does everyone need to see the roots forming? we're not in school anymore and we all know what roots look like. So leave them alone, in the dark, and let them do their thing. The plant will reward you in the end if you start with a larger pot. Good luck rooting your softwood cuttings and please keep us updated.