This is what I follow in keeping my diet "biblical": "Every moving thing that lives shall be food for you. And as I gave you the green plants, I give you everything." (Genesis 9:3) "And there came a voice to him: “Rise, Peter; kill and eat.” But Peter said, “By no means, Lord; for I have never eaten anything that is common or unclean.” And the voice came to him again a second time, “What God has made clean, do not call common.” (Acts 10:13-15) "it is not what goes into the mouth that defiles a person, but what comes out of the mouth; this defiles a person.” (Matthew 15:11) "So, whether you eat or drink, or whatever you do, do all to the glory of God." (1 Corinthians 10:31) For the diets of others: "As for the one who is weak in faith, welcome him, but not to quarrel over opinions. One person believes he may eat anything, while the weak person eats only vegetables. Let not the one who eats despise the one who abstains, and let not the one who abstains pass judgment on the one who eats, for God has welcomed him. Who are you to pass judgment on the servant of another? It is before his own master that he stands or falls. And he will be upheld, for the Lord is able to make him stand." (Romans 14:1-4)
You should actually read the scriptures to learn, and not pick and choose to support what you want to do. Peter's vision had nothing to do with food. Your next quote is about going beyond clean to vegetarian or vegan and looking down on those who only follow the law. Read Isaiah 65-66 and see what it says about those who eat swine's flesh.
"But I'm free. I have the 'right' to do as I want". No, you have no rights as a Christian.
1 Corinthians 6:19-20
19 What? know ye not that your body is the temple of the Holy Ghost which is in you, which ye have of God, and ye are not your own?
20 For ye are bought with a price: therefore glorify God in your body, and in your spirit, which are God's.
Luke 17:7-10
7 But which of you, having a servant plowing or feeding cattle, will say unto him by and by, when he is come from the field, Go and sit down to meat?
8 And will not rather say unto him, Make ready wherewith I may sup, and gird thyself, and serve me, till I have eaten and drunken; and afterward thou shalt eat and drink?
9 Doth he thank that servant because he did the things that were commanded him? I trow not.
10 So likewise ye, when ye shall have done all those things which are commanded you, say, We are unprofitable servants: we have done that which was our duty to do.
Matthew 7:22-23
22 "Many will say to Me on that day, 'Lord, Lord, did we not prophesy in Your name, and in Your name cast out demons, and in Your name perform many miracles?'
23 "And then I will declare to them, 'I never knew you; DEPART FROM ME, YOU WHO PRACTICE LAWLESSNESS.'
LAWLESSNESS = Not following Torah, the Old Testament laws.
Many Christians will hear this, as those who love him keep his commandments, not look for reasons to break them.