My very dear one,
I received your message. You can start with tonglen and lamrim meditations, and after some time maybe you can do the other practices, slowly. There is no rush, this advice is for your whole life.
Regarding your situation now, you can experience this on behalf of all sentient beings who are suffering. You can suffer for them, on their behalf, thinking, “This is all sentient beings’ suffering,” and you experience for them. Then think that all sentient beings are free from that and achieve dharmakaya.
If you just do that each time, if you dedicate for them, suffer for them, that is most unbelievable, unbelievable, unbelievable, most unbelievable purification. It’s an unbelievable, unbelievable, unbelievable way to purify negative karma and defilements; an unbelievable way to purify obstacles and collect skies of merits; an unbelievable, unbelievable, unbelievable, unbelievable way to practice bodhicitta. That makes it quick to be able to achieve enlightenment for sentient beings, and that also becomes the cause of enlightenment for sentient beings. It’s a very pure, very quick cause to achieve enlightenment, and the best preliminary practice.
It’s like an attainment, if you think of the benefits. You can think how lucky, how fortunate you are to be able to experience this for all sentient beings so they don’t have to suffer, they don’t have to experience all the unbelievable sufferings. Also they are numberless and you are just one person. Everyone is just like you in wanting happiness and not wanting suffering, so you can understand it like that.
Please try this way.
With much love and prayers ...