Don't complain. Sometimes it is okay to mumble a bit, but never remain stick to a grudge. No matter what, do what you can. Don't focus on what you cannot.
I often say to myself: "Nothing or nobody can block me forever from what I am supposed to do." Sometimes I may be faltering or fainting a bit in life's turmoil, but that is not what I am supposed to be like forever. There is a purpose in my life. I don't know what that is all about, but I have to believe it. So I say I live because I believe.
You can decide what is the best for you. No one will tell you what is the best. You can be true to yourself and listen to your inside. You may feel awkward a bit about yourself. But you are the key to yourself. The world is a reference to you.
Don't have a burden that you can or must be perfect. If you think that way, that may be a deception because perfection is not that which is achievable in this world. We make progress little by little. If we are perfect, there is no need to make efforts. Maybe our lives would be boring or monotonous.
Time is precious. Don't waste it. Even you are not yours. Do what you can do now. Tomorrow is in the divine.