You've already been offered great advice but I want to mention a few other things you may not have considered.
Instead of playing your Assassin in melee range of enemies, you could play him as a caster by changing your secondary to Mesmer and investing your attributes only in Deadly Arts and Inspiration Magic. You skills would be Assassin's Promise, "You Move Like a Dwarf!", Ebon Vanguard Assassin Support, "Finish Him!", Auspicious Incantation, and maybe Signet of Deadly Corruption (in case Finish Him! doesn't kill your target). The other 2-3 skills are entirely up to you. This build requires a rank 5 in Norn and Ebon Vanguard titles for best use and it's generally used when you have a somewhat reliable team with you. So, for example, if your allies are depending on you as their primary source of DPS then this build won't work that well. But, if your allies are mildly competent then you're going to be a major asset to your team.
I've used a build similar to that one to get Legendary Guardian and Legendary Master of the North on my own Assassin, so I'm quite fond of it

And the only thing I changed was taking out "You Move Like a Dwarf! and putting in Web of Disruption and Cry of Pain.
Also, you are correct that most people won't like it if you beg for stuff... however, you seem pretty cool to me so I'll donate some stuff to you. My IGN is Schmerdro Ravissen, my timezone is UTC -4, and I assume your IGN is Pocket Raptor.
I'll give you a short description of how to get 21 HOM points.
1. I'll donate to you 1 rare (gold) miniature which will give you 2 HoM points. If you want to get a unique (green) miniature then I suggest you read about the
Black Moa Chick which would give another HoM point, but this is not necessary for you to have 21 HoM points.
2. We could hunt for Cloths of the Brotherhood in the EoTN so you can upgrade the armor of 10 of your EoTN heroes. Then we could hunt for Stolen Sunspear Armors in the Nightfall campaign so you can upgrade 5 of your Nightfall heroes. Afterwards, I can show or help you get the Black Widow Spider, Black Moa, and Imperial Phoenix animal companions. And now you'd have 20 companion statues which would increase your HoM points by 4.
3. I could help you do the Sorrow's Furnace and the Fissure of Woe elite areas. Then, if you can get the Protector title for Tyria, Factions and Elona, you'd gain 5 HoM points. Alternatively, if you don't want to get some of those Protector titles then you could try to get some other title that seems more convenient for you.
4. I can give you the materials and gold to buy a cheap elite armor. Just tell me which one of your characters you want to have this armor, and I'll tell you which armors are the cheapest for that profession. This will give you 1 HoM point.
5. I'll give you a Destroyer and an Oppressor weapon, which will give you 3 HoM points.
If you want to look at your own (or other people's) Hall of Monuments, you may do so with
this website.
Enjoy the lore of GW and the scavenger hunt for your HoM points! And, if you have any more questions, feel free to ask