Hi @freedom even if all this doesn’t make sense right away it’s good to know that this is the word of the Buddha:
“Mendicants, form is not-self. For if form were self, it wouldn’t lead to affliction. And you could compel form: ‘May my form be like this! May it not be like that!’ But because form is not-self, it leads to affliction. And you can’t compel form: ‘May my form be like this! May it not be like that!’
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Is form permanent or impermanent?” “Impermanent, sir.” “But if it’s impermanent, is it suffering or happiness?” “Suffering, sir.” “But if it’s impermanent, suffering, and perishable, is it fit to be regarded thus: ‘This is mine, I am this, this is my self’?” “No, sir.” “Is feeling permanent or impermanent?” … “Is perception permanent or impermanent?” … “Are choices permanent or impermanent?” … “Is consciousness permanent or impermanent?” “Impermanent, sir.” “But if it’s impermanent, is it suffering or happiness?” “Suffering, sir.” “But if it’s impermanent, suffering, and perishable, is it fit to be regarded thus: ‘This is mine, I am this, this is my self’?” “No, sir.” SuttaCentral
Please feel free to clarify and doubts on this forum. This might help- Atma- analysis of Self - #5 by Gabriel