"ਮਤ ਵਿਚ ਰਤਣ ਜਵਾਹਰ ਮਾਨਿਕ, ਜੇ ੲਿਕ ਗੁਰਾ ਕੀ ਸਿਖ ਸੁਣੀ..."
With lockdown NOW is the better time to start this. Do 5 Japji sahibs a day (Nitnem's one excluded in count). The first Japji Sahib should be nice n slow... in fact slow like "Ik..." then contemplate on Ik, what does it mean? "Oa-n-kaar" (what does this mean)?
In concentration we all have our methods. Some will lose concentration and repeat back where they lost concentration. Others will lose, get back concentration then lose again but keep going over time maximising their concentration.
In order to maximise concentration it's vital to KNOW the translation of Gurbani. Know the translation then concentration should be 80% there within you.
Finally, doing Mool Mantar and Gurmantar's also vital. Do five Mool mantar with concentration u will be boosted whole day. 108 Mool mantar can be achieved in 15 mins. From exp with Mool Mantar, swift is better esp when it comes to concentration.
Once u start u should notice affects of it in your jeevan within 4 days and maximum affects in 6 months time. Thas 4 days n 6 months. Keep at it! Then do the same for rest of the 7 Baanias.