[robaye]

From what i've just read is that meditation/mindfulness for long periods of time (hours) can have negative effects[1] as OC stated, but it seems short periods of guided meditation (5-10 min) can be beneficial[2].

1. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9024164/

2. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4705029/

[n3storm]

Also, worrying about not beeing able to achieve mindulness (no matter the practice itself) delivers mental issues.