We recommend doing Metta; it is much faster, and more pleasant than breathing meditation. Listen to bhante Vimalaramsi's explanation:
Comparing Metta with breathing meditation
If you have practiced Breath or Anapanasati before, it is likely you didn’t practice it the way we teach it. We teach it using the 6R's, and the Relax step, which is fundamentally different. It is in line with what the Buddha described as Right Effort.
We prefer people to learn a new type of meditation. That way, you don’t run the risk of accidentally falling back into old habits of suppressing hindrances. Please, don’t even consider breath.
According to Bhante Vimalaramsi, it is almost unheard of if people truly can’t practice Metta meditation. Just stay with Metta – It takes a little bit of practice, that is all.
And besides, this world could do with a bit more Loving-kindness.
Group Support
If you need more advice, feel free to join our international community. Questions are always answered and you will get a great deal of encouragement from your fellow meditators!
https://groups.io/g/dhammasukha