Can I read artscroll’s english translation instead of targum when doing shnayim mikroh?
It depends on your level of understanding of the targum. if you understnad it then you should read the targum however if you can’t understand it, then you may read it in english from a reliable english source.
O:CH 285-3 M”B 4,5. R’ Dovid Feinstein in the name of R’ Moshe Feinstein ZT”L in Yagel Yackov pg. 208.