A group of people who aim to enhance quality of life for all people while following the laws and practices described by the Bible- the most defining characteristic is believing in the Sabbath to be the seventh day, Saturday.
We believe Saturday to be the true seventh day, therefore, the true day for worship. You can absolutely worship on other days! But, God blessed the Seventh day and made it holy which is why we honor it and come together for formal worship.
The short answer is no. However, in Hebrews 10:25 it says "not forsaking the assembling of ourselves together, as is the manner of some, but exhorting one another, and so much the more as you see the Day approaching". A church is stronger together. Rather than ask "Do I have to go to church", rather ask yourself "Can I grow spiritually alone?"
No, we do not have a specific dress code, however, we do like to remember we are in God's house so we come wearing our best clothes.
As much as we would love to show all our friends and family the truth, we cannot force anyone to come to church. God is a God of love and free will, therefore will not force anyone to follow Him who doesn't feel called. What we can do is pray honest prayers.
It is important to remember God does not need us to make His plans for Him. God is a God of faithfulness, but sometimes his timing does not line up with ours. Abraham waited 25 years for a son and at the ripe age of 100 years old, Isaac was born. Prayer does work, but we need to study the Bible so we know how to pray "yes prayers".
In Job 14:12, God says "So man lies down and does not rise. Till the heavens are no more, they will not awake nor be roused from their sleep". God likens death to sleep- no more pain, no more suffering, but we will not rise up to Heaven until Jesus comes for the second time.