This is outdated system with outdated GPU and CPU (7 years since official release). I'd suggest you buying/building new one or recording low spec games on 720p resolution.
Your system may run GTX 750 Ti, but for GTX 950 or newer GPUs isn't powerful enough.
You are not going to be accepted in first day. There's a huge ammont of YouTubers that want to join Fredom! I'd suggest you to wait for few weeks and if you still aren't accepted to the Freedom! family, open a support ticket. This is how I got accepted/invited to Freedom! family.