Let's look at one error and one good use of present perfect here.
Lifen wrote:Therefore I have been set a daily schedule for myself.
Here, we have present perfect passive (have been + past participle). To fix this error, make it active voice. It needs to be active because the subject 'I' is the one performing the action, the one who has set the schedule.
Lifen wrote:I have told myself never give up.
This is good. At some point in the past - we don't know exactly when, but we know it's important now - the author told herself 'never give up'