May I humbly recommend the following two books before you embark on study of tafseer and hadeeth:
Usool at Tafseer by Dr Abu Ameenah Bilal Philips
"An Excellent Gift to Students of Islamic Sciences Literally translated 'The Fundamental Principles of Qur'aanic Interpretation,' this book refers to the branches of knowledge which are necessary to provide an accurate interpretation of the Qur'anic texts, such as Arabic grammar and syntax, Arabic literature and Qur'anic sciences ('uloom al-Qur'aan). Addressed topics include the Tafseer of the Qur'an, books of tafseer, translations of the Qur'an, Wahy ('divine revelation'), reasons for revelation, the differences between Makkan and Madinan revelations, Naskh, the Muhkam and Mutashaabih, and more."
Usool al Hadeeth by Dr Abu Ameenah Bilal Philips
"The science of hadeeth terminology and assesment is a particularly difficult field of study. Dr. Bilal Philips has managed in this text to simplify this topic and to make it quite relevant to our times by addressing some of the most challenging questions raised by those who question the validity of hadeeth literature in general."
They are a really interesting read in themselves and broaden ones background a bit on the subject of hadeeth and tafseer and the sciences and methodology behind them and basis of them. Insha'Allah they'll help strengthen your foundation on the subjects and the knowledge you gain will benefit you as you read ahadeeth and tafseer.
If you haven't already, I'd also humbly suggest starting learning classical Arabic, as everything you read otherwise is a translation.
If possible, and I know it might not be everywhere, perhaps you could find a reliable teacher. There are also online courses, but again you have to pick something reliable.
is s searchable hadeeth website that has original text and chains of narration along with translation. The home page lists all the hadeeth collections it has.
May Allah make it easy for you and give you and us all tawfiq to read, understand and implement Quran and hadeeth in our lives, ameen.