Amongst the species we normally see in garden centers as mass produced mallsais, I would say that chinese elm is the easiest one. But it needs to be grown outdoors. Most of us grow outdoors and bonsai is traditionally an outdoor hobby.
If you for any reason just cannot accept that bonsai should be done outdoors and want to grow indoors go for jade trees. Portulacaria afra or crassula ovata.
Good luck with your fukien. I have a hunch based on the original of this species that high humidity may be an important key to success. Somehow based on experience, I think that lower temperature during winter may compensate the lack of light. Both parameters hard to fulfill in living room conditions.