Hi @Lbiney, welcome to the forum.
In answer to your question, the only one I’m aware of which might have another round soon is Freetrade (I think they are planning one in 2019?) Monzo just had a round so won’t be doing one for a while as they are farther on than the others. Coconut may do another one in a year or so as they’re at an early stage. EIS investments are best IMO if you can as you can set them against tax and I think they are free of CGT if you manage to sell.
However, if you’re just starting with investing in general I’d say an index tracker fund with low fees might be a good bet initially and to steer clear of crowdfunding until you have other investments and spare money. Freetrade has lots available and it is far less risky than crowdfunding.
Apologies if you already have other investments and are well aware of this. Crowdfunding is a long term bet, and highly illiquid and risky compared even to shares of established companies.
I’m not sure how many more crowdfunding investments I’ll do, but it’s certainly a really interesting area, exposing very early stage companies to normal investors like us. I’ll be interested to see how it develops in parallel to established markets over the next few decades, and whether I look back on these decisions to invest with fondness or regret.