Has Anyone Gone Through a UK Visa Appeal?

Advice on Handling a Visa Refusal

Hi all, I recently received a visa refusal and I’m now considering a UK visa appeal. The reasons weren’t entirely clear, and I’m trying to understand whether an appeal is the right route or if I should reapply.
A Few Questions I Have:
What’s the timeline for appealing a UK visa refusal?

Is it better to appeal or submit a new application?

Can I submit additional documents or explanations during the appeal?

Should I work with a qualified immigration solicitor?

Considering Expert Help?
I’ve heard positive reviews about Visa and Migration Ltd, who assist with UK immigration appeals. If anyone here has used their services during a UK visa appeal, I’d be grateful to hear how it went.