(1) Also study Fazai-e-Amaal and Hayatus Sahaba.
(2) You should study Maariful Quran of Maulana Mufti Muhammad Shafi which was translated into English by his son Maulana Mufti Taqi Usmani.
(3) The practice of offering Salam after offering salah invented by the ignorant and the innovators is not proved from the Holy Quran and Hadith. It is a riya (showy thing) to recite durood after salah loudly; one will not get reward for reciting the durood this way. Durood should be recited softly with sincerity, earnestness and concentration sitting alone, then it will be effective and reward-able. You should recite durood as much as you can; rather it is better to have a practice of reciting it in the morning and evening.
Allah (Subhana Wa Ta’ala) knows Best
Darul Uloom Deoband