Hi @chandra kumar and welcome to the Community!
Atlassian offers a lot of training and documentation that you can consume at your own pace. A quick search by keyword is very likely to present you with a lot of valuable information.
Apart from that, you could consider joining a weekly demo with live Q&A. You can sign up for those right here.
You can also ask your questions right here on Community. Don't expect free consultancy for your biggest architectural challenges, but a very responsive and skilled audience of volunteers who love to share their knowledge to help other Atlassian users resolve their challenges.
If you really need some expert help to get you on the right track, you may also consider reaching out to an Atlassian Solution Partner in your area.
Hope this helps!
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