You might like a more low-tech option: have your seed on a piece of paper, then copy that paper (by hand) and split it in 2 parts. give each part to a different friend. Of course you make sure these friends do not know each other.

You can even do this multiple times, so for example note the seed again on a piece of paper, and give a part of this one to 2 different fiends. Then even if one of the friends falls away, you have a redundant copy of every part of the key.

If you do not trust your friends, then keep part of the seed yourself. There are many variants of course of this, but you get the idea.