How do we know that the bible is true??

Many people argue that the bible is not true because who can guarantee that all things that is in the bible is 100% true and all those things were really happen??? who knows that people might misinterpret them since we are now using the translation bible which means that it wasnt written in the language we speak today???
As human it is normal to think like that and to have doubt about the bible. I used to doubt a lot too about the bible. I even doubt that all the things that was said in the bible including the miracles that happen were true. I mean those stuff doesnt happen these days and i wasnt there to witness those things so it is very hard indeed to believe in the bible.

Many people also argue "how can i believe in the bible if i dont even know/see that God is exist??" What do we want?? miracles to happen so that we will believe that God is exist??? will we really believe in God if those miracles happen these days like wht most of us have to say "if u can prove that God is exist, i'll believe it" do we really mean that or we're just using that as an excuse because we dont wanna believe in God knowing that those miracles wont happen these days???
I mean even people in Jesus' days who saw Jesus' miracles were ignorant and doesnt believe in him, so how can we guarantee that we will believe in Him after seeing miracles???
John 6: 42 says that the people were grumbling becoz they didnt believe in Jesus is the son of God even though beforehand they saw/ experienced he did miracles ( feeding the 5 thousand and walk on the water)

How can we be sure that the bible is trustworthy??
- All scripture is God's breathed (2 timothy 3:16)
- it was written by eye witnesses who lived on Jesus' days
- it was written by many people in different time but they're talking about the same thing which is all about God.

what am i gonna do next knowing that the bible is true and it is trustworthy???
what am i gonna do the next time i have doubt about the bible thus the word of God???
knowing that it is the word of God, what should i do with it???