Welcome. You have chosen a great name.
"you've showed a line of independent thinking and an independent spirit, which is very serious"
That is a really enlightening comment from the elder, and is an admission that to be a JW you need to be a mindless follower. It is common requirement for any high control group.
I had a similar experience. What finally pushed me out was the elders told me to research and prove to myself the truth. I realised that I could not prove anything reading only one source (the Watchtower) so started to do a broad range of research. Watchtower information quickly fell apart as inaccurate and dishonest when compared to what I was reading in encylopedias and comparing Watchtower quotes with original sources. One day you will thank the elders for letting you realise the truth, as I now do.
Do not feel depressed. What you have found out is for the best, and you have a whole life ahead of you still. There will be rough times ahead with family and friends but it does sort itself out in the long run.
Most importantly, do not rush into making any changes, or talking about what you have found. You will need time to work out what you want to do, and discussing "apostate thinking" with parents or the elders will get you disfellowshipped and could put you in a tough situation with family and finances.