you read 53 more chapters or only 53 chapters? 91 chapters are out, chapter 92 is out raw and will probably be scanlated within the next week if it isn't already.
Series is slated to be no more than 10 volumes, but we're on volume 10 now and it's very uncertain on just what chapter number it will end.
ALSO, there are several side-stories. There's the 6-chapter story the Dawn which is extremely important reading for Hellsing as it's a prequel involving Alucard and Walter. Pic related. Hirano says he'll continue The Dawn when the main Hellsing story is over.
There's also Crossfire, which was written before Hellsing. It's 3 chapters long and focuses on Iscariot. Not very important but some characters are reused in Hellsing. There's also a million hentai doujins that the author of Hellsing wrote before Hellsing, all with characters and stories prototype to Hellsing. The most important required reading is Legend of the Vampire Hunter (LotVH), a one-shot that's been scanlated.
So you still have your work cut out for you. Don't forget to watch the EPIC OVAs and maybe the crappy anime. Also, as for the manga, it comes out monthly, but he often skips a month. At the rate it's going it'll probabbly be over in a year. The OVA comes out with a mere 2 episodes a year and there's no slated date for the next one. There's 4 episodes out and there will be 10.
NOW YOU FUCKING KNOW EVERYTHING