Looking for Guidance to Strengthen My Iman and Connect with Allah

Salam everyone. I come from a practicing Muslim family, but I admit that for many years, my own faith wasn't very strong. My parents always encouraged me to pray, but I often went through the motions without true presence of heart. I even attended Madrasah and did well in my studies, but I never truly connected with the knowledge I was learning. I've memorized Surahs in the past, but due to my own neglect, I've forgotten many of them. However, over the last couple of years, I've noticed something beautiful: whenever I make sincere Dua' with full trust that Allah will answer, He has answered in ways I can see. I truly believe this is a sign for me to strengthen my Iman. My struggle now is knowing where to start. There is so much information out there, and I feel overwhelmed about which authentic sources to follow. I have started praying my five daily Salah consistently now, with much more focus and intention than before. I'm honestly asking for your sincere advice-what steps should I take? What should I avoid? It brings tears to my eyes writing this, remembering how I let my earlier years pass without embracing the guidance I had. I've even forgotten the detailed rules of Tajweed for reciting the Quran, though I remember the basics. Could anyone please help guide me? Also, I'd like to better understand the Islamic perspective on visiting graves for remembrance versus the concept of seeking blessings at shrines. Can someone explain the idea of *waseela* (intercession) in a clear way? Lastly, if anyone can recommend reliable and accessible sources or scholars from whom I can begin studying Hadith, I would be so grateful.