Improve first-timer process

[cesswairimu]

Welcome Bot Updates

• Maybe remove the part where we ask folks for their twitter handle It would be great if you can tell us your Twitter handle so we can thank you properly ? since we don't do this anymore - Remove twitter handle request #9021

• Add a link to weekly community communication issue by Benjamin where we have Please find the link pinned in the issue section - Add check-in link in welcome bot message #9020

• Maybe also include the link to the gitter channel? - Link to gitter on welcome msg #9023