我每天打坐

*  These two words “可是” and “不过” both <gs id="a749a8ce-5f69-441c-8294-23a3ddc775d4" ginger_software_uiphraseguid="0f31ce1d-e45e-49fa-915e-f31c70314f6d" class="GINGER_SOFTWARE_mark">mark</gs> an adversative relation, but "可是" is stronger than “不过”. 

* The word “也” is not necessary, but  it makes the  sentence more  smooth.

我开始了打坐（是）因为我的工作特别令人紧张，而且我也失眠。 我阅读了一些关于打坐对身体和心理健康好处的文章，决定试一试。 

* Following a verb, “了” means you have done that. Here, "阅读了”means you have read the articles so that you made the decision of trying. 

* The word “是” is not necessary, but  it makes the  sentence more  smooth.

*The difference between “的”and“得” is even a headache for many Chinese-native speakers. “得” usually follows a verb or an <gs id="fbe60691-c6cb-4ab0-ae26-094286c42ef6" ginger_software_uiphraseguid="44103275-cda8-493e-9e22-e30f04a82d95" class="GINGER_SOFTWARE_mark">adj</gs>. <gs id="f42a157c-c570-41bc-95ec-fe4d99786d96" ginger_software_uiphraseguid="39123c0a-e7ba-4afa-8667-f8b3536b74f2" class="GINGER_SOFTWARE_mark">to</gs> show a degree or a change in degree, such as “变得更容易”<gs id="3457f49d-8529-410e-8e0d-2d4a6edec448" ginger_software_uiphraseguid="39123c0a-e7ba-4afa-8667-f8b3536b74f2" class="GINGER_SOFTWARE_mark">、</gs>“睡得更安静”.

现在我的心情比以前轻松。我每晚都睡得安静。

-------------------------------------------------------------------

Hi Therese, I love your writing. It's so clearly organized, and your grammar skills are excellent. The minor changes  I made are only aiming at making it more natural on a native-speaker level.

BTW, I love meditating in the morning too:)