Well, the original is 8 seasons, so it might take you a while to get to Dexter: Resurrection 😅 on the other hand, it's one of my all time favourite shows and got me through the last months of my PhD.
You'll miss some of the feels and impact, but I think it would be watchable - honestly not sure. I'll give a brief summary of backstory in next to, but it is spoilers for original series and New Blood.