There's a book by James White called 'The Forgotten Trinity' which may help. It's available on Amazon DE. I know any book takes time to read but considering the depth and the importance of this subject, I'd say making time to read will be worthwhile. Not least for the devotional value!
It's important to consider that a good understanding of the Trinity won't come easily, but it's possible to learn enough to understand correctly. We shouldn't expect it to come easily because It touches on the very nature of God himself. It's one of those things that must be studied patiently, understanding will come in time.
I would reccomend to you The Forgotten Trinity by James White. https://www.amazon.com/Forgotten-Trinity-James-R-White/dp/1556617259
Here is the synopsis: Discover Afresh the Living Truth of a Foundational Christian Belief The Trinity is a basic teaching of the Christian faith. It defines God's essence and describes how He relates to us. The Forgotten Trinity is a concise, understandable explanation of what the Trinity is and why it matters. It refutes cultic distortions of God. It shows how a grasp of this significant teaching leads to renewed worship and deeper understanding of what it means to be a Christian. And amid today's emphasis on the renewing work of the Holy Spirit, The Forgotten Trinity is a balanced look at all three persons of the Trinity.
Heck, I'll buy it for you.
Obligatory, since St Patrick's day was last week: https://youtu.be/KQLfgaUoQCw (a good way to remember the heresies)
One book that helped me with the Trinity was James White's "Forgotten Trinity" https://www.amazon.com/dp/1556617259
Semantics is important. When one says that a person in the Trinity is a part of said being it isn't the same as saying a person in the Trinity is wholly/fully that Being.
Jesus is fully God. Not a part of God. The Father is fully God. Not a part of God. The Holy Spirit is fully God. Not a part of God.
I recommend the following book for a proper understanding of the Trinity:
https://www.amazon.com/Forgotten-Trinity-James-R-White/dp/1556617259
You can also read the following write up:
https://www.aomin.org/aoblog/theology-matters/a-brief-definition-of-the-trinity/
Dr. James White does a great job explaining the Trinity in it's proper understanding.
https://www.amazon.com/Forgotten-Trinity-James-R-White/dp/1556617259