I suggest you to focus on issues at Github for grin-wallet and grin node itself. There are bunch of opened problems as well.
Currently Grin needs Multisig to keep fund in GRIN and to have ability to integrate it on DEX (what you can do at your wallet as well). We have unfinished work here Multisignature Outputs by GeneFerneau · Pull Request #85 · mimblewimble/grin-rfcs · GitHub.