You need to carefully develop an entry plan, as the market is up over 22% since November 20th, which is substantial. The market seems to be nearing some technical resistance at the 920 level on the S&P 500, which may result in the market moving lower over the short term. Therefore, I would say you may want to implement a dollar-cost averaging strategy, as the future outlook for the markets is still uncertain. Consider purchasing a portion now, more a week (can be weekly, biweekly, monthly, etc.) from now and so on, as you will be able to take advantage of price volatility and establish an attractive long-term cost basis. Either way, now would be a great time to initiate a position taking a long-term perspective, as the market’s fundamentals are slowly improving as the government steps in to lend support. The fiscal stimulus will likely help stabilize the economy, so it is a matter of when it will be passed. Just be disciplined when implementing your purchasing schedule. If you have little experience, consider purchasing the SPY, which is an index fund that tracks the S&P 500, as it has low fees and provides great diversification to help reduce your risk of loss. Just my thoughts, I hope they help.
Best of luck!