As well as the suggestions in previous posts, I would encourage the original poster to check at least via the factsheet the top 10 holdings and overall geographical allocation of any fund/trust before investing.
A number of 'global' funds and trusts include investments in UK-listed companies like Glaxo, Shell, Diageo which may duplicate holdings in investments you already have. This is explained in some depth in an article from
Kepler Trust intelligence.
In addition the proportion of holdings invested in the USA can vary significantly between investments.
Of course like for anyone the appropriate investments depend on one's time horizon and risk tolerance. If the latter are long and high respectively, then to ensure geographical diversification I would suggest alongside a generalist global fund considering some exposure to emerging markets, possibly frontier markets. In investment trusts, Jupiter Emerging and Frontier Income (JEFI) and Blackrock Frontiers (BRFI) both offer yield in excess of 3% at the moment, although JEFI has only been launched recently.
Another factor to consider besides initial yield is the track record of income growth, data on which can be found on Trustnet, and for investment trusts at
The AIC web site.