Hadith has nothing much to do with sunnah. Its mostly a record of the times and life of the Prophet s.a.w. After all he was human being who had friends, family, he interacted with his people, he sat and ate with them, what his likes and dislikes were, how he treated his friends and family, so on and so forth, so many people who saw the Prophet do these things, some decided to narrate these events some decided not to.
One would imagine the person who spent the most time with the Prophet s.a.w was his friend before he became a prophet wasby his side literally almost all the time and even succeeded him as the Ameer, Syedna Abu Bakr r.a would have narrated the most amount of hadith regarding the Prophet s,a,w but in reality he has related I think maybe only 50 hadith. Same with Hazrat Umar r.a. That is because The Prophet strictly warned that associated lies with me is not the same as lying about any other person and who ever does so will have a special place in hell. So his closet Sahaba were very careful about narrating hadith.
On the other hand someone like Abu Huraira who compared to the others hardly knew the Prophet. less than 3 years, never embarked on any adventures with him has narrated the most hadith than anyone elese, even if you combine all the hadith of the Kulafa Rashidun and the Ahl e bayt they are still out numbered by the hadith narrated by Abu Huraira.
There is a hadith ( although I am still investigating this claim to be authentic or just shia propaganda ) That Hazrat Umar r.a actually whipped Abu Huraira one time on the account that he would narrate too much hadith all the time, but once Hazrat Umar r,a passed away he started again to narrate hadith.
Sunnah is not having 000cms long beard, wearing certain type of headgear, using miswak, having pants above the ankles, women dressed like tents, segregated from society behind locked doors etc etc. Come on man, you think Allah s.w.t would really care about any of these things? Read the Quran if it were these thing would be mentioned again and again, just like tawheed, salah, zakah etc etc is.
Even if you are a moderately practicing muslim. You already know all the Sunnah, whether you do raf al yadeen or not, tie your hand above the navel or below etc etc, these are all petty things that do not matter, Allah s.w.t looks at your niyah and even according to the hadith the Prophet prayed incorporating all of these. Sometimes he would do raf al yadeen sometimes not, sometimes he would tie his hands like this sometimes like that.
Our traditionalist mullahs has entangled us in this petty dogmatism all the while ignoring the larger picture of the deen, can you believe once someone in Pakistan told me that my prayers won't be accepted because I was wearing jeans and "namaz" can only be accepted in shalwar khameez!!!!
As for books Meezan is a good book to get started off by Javed Ghamdi, it is also translated into English
I also strongly suggest watching this 8 episode series.
https://www.youtube.com/playlist?list=PLvDnnnkYLWQd2fOzwPb-SDxVHtoC4bN3n