Honestly, for S1 Lit it really depends on whether your child needs a tutor who can build up their close reading skills from scratch or one who pushes them harder if they already have a decent foundation, those are quite different needs. My neighbour brought her daughter to a home tutor through a tuition agency and said the key thing she looked out for was whether the tutor had a track record of improving students by at least a grade or two within the first semester, which is a reasonable benchmark to hold them to. Some tutors are very good at the essay structure side but weaker on the unseen poetry component, so it's worth asking specifically about that during a trial lesson. If you're in the east side, there are a few home tutors around Tampines that parents have mentioned positively, though I'd say always do a trial first before committing to a package.