Love this question.
I stumbled on meditation in my early 20s and I’ve been lucky to have continued (although somewhat hap-hazardly at times), for the last 40 years, and can honestly say it’s one of the biggest blessings in my life. Dramatically helped me in business and in my personal life. And now it helps me to be a much more , calm, centered, excellent portfolio manager.
My main technique is sitting upright and doing a long slow breathing meditation:
with seven second inhalation, three second hold, and then at least 10 to 12 second exhalation .
(There’s great science around the benefits of using a longer exhalation than inhalation.)
Also I simply observe my breath and label the inhalation anything once soluble that has a positive connotation such as “love”. And the exhalation labeled with a different word that is one syllable, such as “peace”.
Both of these techniques come from lineages in the yoga traditions that are many centuries old and have stood the test of time.
Hope you get excellent results from whatever you’re doing in this great exploration into meditation.