I had a temple recommend, was endowed, and participated in or witnessed all temple ordinances.
Yes, there are some similarities between Freemasonry and the temple Endowment ordinance, though I think the similarity is often overblown by some critics (and it should be noted that the Endowment has undergone changes throughout LDS history, where certain parts that used to be done are no longer done, some of which had more clear Masonic origins than others). Today, I’d say that the most obvious Freemasonry found in the Endowment can be seen in the use of signs and tokens. Other parts come from the Bible and Mormon-unique scriptures, involving things like Creation and the Fall. You will find many opinions on this amongst Mormons. When I went for my temple recommend interview, my stake president told me that the Endowment contains elements from many places, including the scriptures, Masonic elements (yes he directly said that), etc. Some will say that Masonry is a corruption of the true Endowment that was lost. Others will say that Joseph Smith and others borrowed elements of Masonry to explain true concepts. Today, many LDS perhaps aren’t even aware of the connection.
LDS believe that the Father resides on a planet or star near the star Kolob. LDS believe that we are all spirit children of God the Father and His spouse, Heavenly Mother. They also believe that if we endure to the end (receiving all the necessary LDS-performed ordinances, and follow the commandments), we can be “exalted”, which can include having spirit children ourselves.