Hi Alepte,
Welcome to the forum. I am one of those people Gregory referred to above as someone having a long-term relationship with SDA's; but I hold several minority views. I won't get into those minority views now, since you are searching I don't want to Say anything that would confuse or discourage you.
Like Gregory says, faith is a journey; not a destination. I myself was raised a devout Catholic - so much so I almost became a priest. As I read the Bible, I - like you - began to see discrepancies between scripture and Catholic doctrine; so I eventually became and SDA.
As I continue to study, I also see discrepancies between my understanding of Scripture and Adventism. I have also come to the conclusion that spirituality is more about a proper relationship than about correct theology. If we truly love and trust Jesus, any questions we have on theology will be clearly answered by Jesus in the Kingdom; and because we love and trust Him explicitly, we will believe everything He tells us.
In my humble opinion, not all theology is salvational. For example, Catholics worship on Sunday; and SDA's worship in Saturday; which is in accordance with the Commandments. Does that mean that if you don't worship on Sabbath that you will go to hell? In my opinion - NO! Some of the most devout and loyal Christians I know worship on Sunday. SDA's believe that pork in unfit for human consumption as stated clearly in Leviticus. Does that mean that people who eat bacon with their eggs in the morning will go to hell: NO!
Do you love God with all your heart. strength and mind? Do you believe His is the only Name under heaven by which we may be saved? THAT is the essence of salvational truth, no matter what Christian sect you belong to.
May God bless you with wisdom and discernment on your journey to His Kingdom!