What it comes down to is that nothing you have is really yours. It all belongs to God anyway.
So we’re not really giving to him, we’re just giving some of his stuff back to him and keeping less for ourselves.

In the Old Testament they had to give 10% of their money to the priests at the temple.
But we are not the Jews. They had heaps of rules and regulations. Yeshua did away with all that for us by fulfilling it on the cross.
So we don’t have any rules about giving.

The most important thing is that you feel like you are giving generously. If you’re doing that you’re probably OK.
God doesn’t need your money, what he is looking for is if your heart is willing to let go of the security you have with money and just trust him.

The second most important thing is that you try to keep your giving a secret. Try not to let the person you give it to know who it’s from. (if you can).

But give. To your church. To your pastor. To missionaries. To Christians you meet who need help. Buy books for people. Buy food for people.
Invite people over for dinner (that will cost you extra, but for sure God won’t mind).
It doesn’t all have to go in the bag/plate at church. But make sure you are feeling generous.