Your sentences are almost good, just tried to offer better alternatives.
To mean "I just tried". Does my sentence conveys the subject is "I" in spoken language?
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In certain types of writing, for example:
... we often don't have a lot of space or a lot of time. It is common in these types of writing to drop the Subject - and the auxiliary verb too - if the reader can easily understand who the Subject is. Very often, but not always, the Subject is the speaker. Usually we understand from the context.
These sentences mean:
Notice that in the second example, the Subject is you, not I. Also notice that the auxiliaries be and have are missing from some of these examples too.
This is sometimes called diary drop by linguists.