Burden? Never. Don't know the meaning of the word. Even if you're dead, we can just throw your body to the monster so the rest of us can run away (just kidding, although we have done that).
First thing you need to know about experienced groups is that we're greedy and we love to share our greed. I know enough about this group to say you should plan on equipping Charm of Avarice and the 3 Ioun Stones (Gold, Silver and Platinum). It's not mandatory, but hey, who doesn't like more tokens?
I love the Charm of Brooching and use it myself, but then you're not currently equipping two back items.
If you want, you should also plan on equipping the Charm of Awakened Synergy. You'll get 10 more hp and the party gets an initiative boost. I have 4 extra of those I can lend.
If at any point you are happy with your build...stop. These are suggestions, no pressure to actually do any of them. But I could also say that if there are tokens you'd like to try out to see how they work, with this group, someone probably has an extra you can borrow for the run.
One thing you definitely want to do is get your character to 5th level. You should absolutely work toward that in the future. For this run, I can borrow you the Charm of Heroism. But I could also borrow you a Kilt of Dungeonbane and if anyone has an extra eldritch item, you could get to 5th level that way and not need the Charm.
You do have some really good choices in your build.
The Defender set is a really good set of armor to start out with.
Shirt of the Oaf is also a very good choice.
Love that you have Master Ale Drinkers Bead
By the time the bardsong bonuses get added, I think you'll be happy with your build.