You can also try this site,
https://mempool.space, you can track the transactions that miners can include into the next block by also using the site. The site you posted above is also highly recommended on this forum for checking the mempool, it is even most preferable by experienced users.
Every 10 minutes a New Block is founded
Not necessarily every 10 minutes, it can be a minute, it can be 2 minutes, it can be less than 10 minutes, it can even be more than 10 minutes, but it is calculated to be 10 minutes on average.
There is still need for someone to study about mempool fluctuations very well before he or she will be able to make more use of low fee. Like on weekends and mostly on Sundays, the mempool are usually less congested than the weekdays, in which low fee will be required. Also, if someone can wait and not in haste during weekdays, there are certain low fee that can be paid, I did use 11 sat/vbyte while sending from segwit address to segwit address, and this usually get confirmed during weekdays but it can take hours, 1 or two days before getting confirmed.
You need to also comment on the use of segwit addresses which can result to 42% to 52% fee reduction and result to faster transaction time of the same fee if compared to legacy.