Can we claim GST input paid under RCM in same month? Is this the right procedure?

Hello

Furniture is purchased from an unregistered dealer costing around 20000 rs. Can I Pay gst under RCM and claim it in the same month?

If yes, I should first show it in gstr 3b in row d in the box " 3.1 Details of Outward Supplies and inward supplies liable to reverse charge"

& I should claim it in row (3) of box Inward supplies liable to reverse charge (other than 1 & 2 above)

I have also attached the image for further reference. Is the procedure right? Pls guide