Since you're using IB, and you seem to be an investor not a trader, so you won't notice especially if you walk your orders, but you will suffer the bid/ask spread as everyone else albeit wider.
If buying, the best strategy unless if one is time constrained is to walk the entire bid from the best bid to the best ask. It is highly likely that someone will hit your order before you hit the best ask. If they don't, as a long term investor, the few pennies won't make or break you, especially if the price per share is 100 USD equivalent, but it is an excellent habit to form and fun.
Since you're buying ETFs, even though your orders are small, you would be adding liquidity to your market, helping it become more efficient because your orders could be used to arbitrage against all of the ETF's holdings, in turn providing liquidity for those holdings.
This could only be done with an extremely low cost broker like IB because the trading commissions would make it prohibitively expensive.
There are huge risks when trading an illiquid security such as VEUR. EWL would be much less risky thus less expensive.
Securities with no liquidity can be traded, but they must be traded very carefully. In the case of a security that can only attract about 20 shares per day in volume, only single shares should be bid. The market makers, suffering from a dearth in volume may not even be willing to haggle; therefore, the only recourse is a statistical arbitrageur, who will attempt to profit from the spread between other more liquid versions of the security.
Considering the available alternative, VEUR is not recommended to trade.