Welcome T!
Most do not "know" that the God of the Bible is real, but only "believe." Knowing and believing are completely different.
I happen to be one of those who "know." I had no idea before, and was not raised up in a Christian home and had no indoctrination along those lines. My childhood was wonderful and all went great until I was an adult, married, had kids, and owned my own business. Then my business got broken into three times, put me out of business, ending in bankruptcy, divorce, and being separated from my kids. Meanwhile, ironically, I personally was also excelling professionally, I invented a couple things, won awards--still I lost everything dear to me, and the downward spiral continued.
After trying everything I could think of, I gave up, I lie in my bed one night and began talking to a God I had no idea even existed, and said-- "If you are there--I need some answers. I need to what life is all about and what my part in it is. If it all just ends in failure upon failure--what's the use? I know this is the place where people take their own life--but I am not going to do it--if you want my life You can take it--You can have it! If I don't get some answers, I have just one thing left that has not failed me--I am going to go live in the woods."
Suddenly, I was caught up in the spirit above the earth, above the very spot I had threatened to go-- Well, it's a long story...but when it was over, I was returned to my body--shot straight up running and didn't stop until I was seated at the foot of my bed in a cold sweat, in awe.
The whole event was more real than anything I have ever experienced in this world--so I went from not "knowing" to knowing...and I cannot say I believe. But I do know that I called on Him by name (God) and He answered, and then lead me to a Bible which I read from cover to cover in about 10 days barely stopping to eat or sleep, wherein my experience was confirmed, and the knowledge that it was He who was the Author. It is also evident that there is no other record of experiences like the one I had and those in the Bible of first hand witnesses just like myself, in all the world--in all of history...even predicting the future.
All the best to you on your own journey of discovery!