Firstly, welcome to the forum @WinstonSmith
Some really good advice already shared in this thread and only started hunting down the shiny stuff myself earlier this year. As a newbie I bought a few Brits via flee bay at first before delving more into the rabbit hole and fortunately found TSF soon after, best thing I've done.
I have only a few Oz in Silver and soon realised that after Brexit I'd missed the boat on cheap Brits via Europe, 20% VAT as well as Silver being at such a high I switched metals. YouTuber's such as our great @BackyardBullion as well as 2 is 1 were/are a great way to sit back with a coffee or something stronger over a few evenings to listen to and possibly help shape your knowledge and direction before committing.
One thing I picked up quickly was to keep records of your purchases verses spot so you know when your eventually in the black (although it's a long term goal/savings plan/investment/wealth management etc.) and a few members have been kind enough to upload templates/ideas in Excel etc. you just need to search...
If your stacking, just look out for the deals - some of the best prices are here on TSF in the Buy & Sell section once you know what you after. If your collecting, I'd say your still find great deals here but the dealers like @ChardsCoinandBullionDealer can also often help with those hard to find pieces.
It's fairly addictive but I've learnt that a steady amount of pocket money set aside monthly soon reap rewards rather than going all in at once.
The people here IMHO are really stand-up types and help whenever they can, there's a wealth of knowledge - just remember to do a search prior to asking as most questions have been answered one way or another.
Most of all, enjoy the journey...