"Life in this world makes my hair go gray" - even then, when it is only meant as a proverb, something that you sometimes think, referring to your inner belief, situation, expectation, experience.
Yes, you can color your hair or cut it off. But this will not change your personal relation to God of the Bible. Yeshua / Jesus is the only way. Only he can forgive sin.
The Reply of the Tongue is from the LORD
…30He who winks his eye devises perversity; he who purses his lips is bent on evil. 31Gray hair is a crown of glory; it is attained along the path of righteousness. 32He who is slow to anger is better than a warrior, and he who controls his temper is greater than one who captures a city.…
God knows, what you may have gone through in this life. Turn to him. He reaches his hand out to you by his Grace through Jesus Christ.
Do not follow any teacher you may see on youtube. There are false teachers out there.
Study the Word of God on your own / with others and verify everything that is taught
in relation to the Bible, coming from this world.