StyleCoin said:
I would like to use the Saturn Square to make me a more serious person, who doesn't care what anyone thinks, who is not sentimental, among other things.
Should I start the square at a Full Moon or New Moon?
If you want to develop self confidence working out and focusing on empowering your solar Chakra can help you a lot.
To become more serious /self controlled you can use a daily affirmation. After you wake up in the morning fall into a trance state and state asuitable affirmation 10-20 times!
Saturn Square can indeed help with what you want but be cautious because this Square doesn't always give the best results. If however you want to proceed with this you need to do it with a positive mindset and with a very positive affirmation! I speak from experience there because I have done one about 4 years ago and it worked quite well!
A nice affirmation for what you want can be :
"In a positive, healthy and pleasant way for me, I now gain complete control over my feelings, actions and thoughts completely and permanently"
Or something like
"In a positive, healthy and pleasant way for me, I now gain complete self control permanently"
(you can modify the affirmation if you don't find this suitable for you, just make sure to affirm that what you want is manifesting in a Positive Healthy and Pleasant way for you.)
Also Void meditation can help you with controlling your thoughts and emotions!
One more thing.If you have people that think and speak negatively about you in your environment make sure to focus more on your Aura cleaning and your Aura of Protection.If they act way too bad you can use a binding spell against them.
P. S.
I forgot to tell you that if you see more negativity in your life after you start the Saturn Square you must stop it IMMEDIATELY! Thankfully Jupiter is in an very nice placement currently so if things go bad you can do a Jupiter Square to neutralize all this negativity!!!