Bitrate is fine, at 128 kbps
Recording is mono
Sample rate is at 44100 Hz
Volume is on point at the ro(Romanian?)-test, only one dB out of the range in the english test but it doesn't sound too loud
Noise is acceptable, I can hear your voice clearly and it didn't bother me at all.
You worked very well on the raw file For LibriVox, this test can be marked as ok.
Of course you can still work on your setup here to make your recordings even better
I am a bit curious, your test is named "kitchen", so I assume it was recorded in the kitchen - what about the pillow behind the mic in the room you recorded before? Is it better?
If you'd like to buy a new microphone I don't want to keep you from it, the economical me in myself only thinks, it's maybe better to test whether you like recording before investing There are audiobooks on LibriVox that show different microphones:
I do have a small condenser that I originally bought for singing and music that serves very well for my LibriVox-recordings, too. You might want to buy an USB-microphone, it is just easier to handle.
edit: I wanted to mention that those showdown's arent't tests and also that you will have to choose (and maybe test) the mic you like most with testing it yourself, as far as it is possible. But the showdowns might give you some hints, maybe. There are a couple of microphones used here at LibriVox that are very popular, I remember Blue Yeti, Samson ??, Blue Snowball, ..
I think this thread might help you: