Mostly. There's something about the cannabis that is indeed relaxing, but you shouldn't rely too much on external sources, no matter the benefits. You will start to think that your creativity only comes from such dependency. Give a try to meditation and mindfullness – there are many kinds and one will surely fit your needs. Meditation is placebo to an extent, but it comes from you (no external sources), it can be done anywhere and it makes you more aware of yourself. Everyone I know that started practicing self-awareness is happier, more creative AND more disciplined.