It may be simple, but it is not necessarily easy. As Catholics we know we need to set our salvation goal daily. Yes, Christ died for our sins, (past); He is with us today to guide us (present); and He will be with us to lead us through the turmoil of modern life (future).
But our eternal salvation is not something we take lightly or for granted. It is an ongoing process, hopefully, for everyone — not just Catholics.
Make salvation as hard as you want to, biblically salvation is easy … just ask Jesus to be your savior (and mean it) and salvation is yours.
As for “easy”, Jesus died for our sins, once and for all. If we accept this premise, then our sins are forgiven “once and for all” if we accept him as our savior.
I have yet to find, in scripture, that we have to spend hours or days or eons in penance to get salvation.
If such were the case then heaven would be a hit and miss circumstance as with the Muslims.