Yesterday I did some exercise with a jumping rope that I bought a few months ago.

Much more natural to use "some exercise" here.

The day passed fastquickly but I felt gladhappy, not because of doing lots of things but rather that I'm learning to enjoy more my life more.

"glad" can come across a little old fashioned in some contexts, so "happy" is better as a default.

"fast" is an adjective, but actually you want an adverb here, so "quickly" is better here.

Last week I watched a video that explained why setting goals isn't the best idea when you're unsure about which path is the best path to choose in your life, career e.t.tc.

"etc" is an abbreviation of et cetera (which is latin)

In casual writing, it can be used as if it was a regular word as just etc

In "standard" writing, the phrase as a whole gets one period at the end, which gets omitted if it's the last word in the sentence.

In very formal writing, you might see "et c." or "&c." but that's honestly a little old fashioned even in very formal writing.

You never see e.t.c. as "et" is a word, not two abbreviated words.

iInstead set constraints that can guide you better in complex decision-making situations.

"constrains" is a verb
"constraints" is the noun

Yesterday, I did exercised with a jumping rope that I bought a few months ago.

The day passed fast butby quickly. I felt glad, not because of doing lots of things but rather that I'm learning to enjoy more my life instead of doing lots of things.

Last week, I watched a video that explained why setting goals isn't the best idea when you're unsure about which is the best path to chooswhat path you want to take in your life, career, e.t.tc.

iInstead, set constraints that can guide you better in complex decision-making situations.